Chapter XXXV: Appendix: , No. X

INSTRUCTIONS TO THE LIGHT-KEEPERS IN THE SERVICE OF THE COMMISSIONERS OF NORTHERN LIGHTHOUSES.

1. The Lamps shall be kept burning bright and clear every night from sunset to sunrise; and in order that the greatest degree of light may be maintained throughout the night, the Wicks must be trimmed every four hours, or oftener if necessary; and the Keeper who has the first watch shall take care to turn the oil-valves so as to let the oil flow into the Burner a sufficient time before lighting.

2. The Light-keepers shall keep a regular and constant Watch in the Light-room throughout the night. The First Watch shall begin at sunset. The Light-keepers are to take the watches alternately, in such manner that he who has the first watch one night, shall have the second watch next night. The length or duration of the watch shall not, in ordinary cases, exceed four hours; but during the period between the months of October and March, both inclusive, the first watch shall change at eight o’clock. The watches shall at all times be so arranged as to have a shift at midnight.

3. At stations where there is only one Light-room, the daily duty shall be laid out in two departments, and the Light-keepers shall change from one department to the other every Saturday night.

4. FIRST DEPARTMENT.--The Light-keeper who has this department, shall immediately after the morning Watch, polish or otherwise cleanse the Reflectors or Refractors till they are brought into a proper state of brilliancy; he shall also thoroughly cleanse the lamps, and carefully dust the Chandelier. He shall supply the Burners with cotton, the Lamps with oil, and shall have every thing connected with the Apparatus in a state of readiness for lighting in the evening.

5. SECOND DEPARTMENT.--The Light-keeper who has this department shall cleanse the glass of the Lantern, lamp-glasses, copper and brass work and utensils, the walls, floors, and balcony of the Light-room, and the apparatus and machinery therewith connected; together with the Tower stair, passage, doors, and windows, from the Light-room to the Oil cellar.

6. For the more effectual cleansing of the glass of the Lantern, and management of the Lamps at the time of lighting, both Light-keepers shall be upon watch throughout the first hour of the first watch every night, during the winter period, between the first day of October and last day of March, when they shall jointly do the duty of the Light-room during that hour. These changes to and from the double watch shall be intimated by the Keepers in the Monthly Returns for October and April.

7. At those stations where there are two Light-rooms, each Light-keeper shall perform the entire duty of both departments in that Light-room to which he may be especially appointed. But after the first hour of the first Watch, the Light-keeper who has charge of this watch shall perform the whole duty of trimming and attending the Lights of both Light-rooms till the expiry of his watch; and in like manner, his successor on the watch shall perform the whole duty of both Light-rooms during his watch.

8. The Light-keeper on duty shall on no pretence whatever, during his watch, leave the Light-room and balcony, or the passage leading from one Light-room to another, at stations where there are two Lights. Bells are provided at each Light-room to enable the Light-keeper on duty to summon the absent Light-keeper; and if at any time the Light-keeper on duty shall think the presence or assistance of the Light-keeper not on duty is necessary, he shall call him by ringing his bell, which should be immediately answered by the return signal, and the Keeper so called, should repair to the Light-room without delay. In like manner, when the watches come to be changed, the bell shall be rung to call the Light-keeper next in turn. After which the Light-keeper on duty shall, _at his peril_, remain on guard till he is relieved by the Light-keeper in person who has the next watch.

9. Should the bell of the Light-keeper whose turn it is to mount guard, happen to be in an unserviceable state, the other house-bell shall be used, and some of the inmates of that house shall call the Light-keeper not on duty, so as by all means to avoid leaving the Light-room without a constant watch during the night.

10. The Principal Light-keeper is held responsible for the safety and good order of the Stores, Utensils, and apparatus of what kind soever, and for every thing being put to its proper use, and kept in its proper place. He shall take care that none of the stores or materials are wasted, and shall observe the strictest economy, and the most careful management, yet so as to maintain in every respect the best possible light.

11. The Principal Light-keeper shall daily serve out the allowance of Oil and other Stores for the use of the Light-room. The oil is to be measured by the Assistant, at the sight of the Principal Light-keeper.

12. The Light-keepers shall keep a daily Journal of the quantity of Oil expended, the routine of their duty, and the state of the Weather, embodying any other remarks that may occur. These shall be written in the Journal-Books to be kept at each station for the purpose, at the periods of the day when they occur, as they must on no account be trusted to memory. On the first day of each month they shall make up and transmit to the Engineer a return, which shall be an accurate copy of the Journal for the preceding month.

13. The Light-keepers are also required to take notice of any Shipwreck which shall happen within the district of the Lighthouse, and to enter an account thereof, according to the prescribed form, in a Book furnished to each Station for this purpose; and in such account he shall state whether the Light was seen by any one on board the shipwrecked Vessel and recognised by them, and how long it was seen before the vessel struck. A copy of this entry shall form the Shipwreck Return, to be forthwith forwarded to the Engineer.

14. A book containing a Note of the Vessels passing each Lighthouse daily shall be kept; and an annual Schedule, shewing the number of vessels in each month, shall be sent to the Engineer in the month of January.

15. The Monthly and Shipwreck Returns are to be written by the Assistant, and the accompanying letters by the Principal Light-keeper. The whole shall be carefully compared and signed by both Light-keepers, as directed by the printed form, and despatched by post to the Engineer as soon as possible.

16. For the purpose of keeping up the practical knowledge of the “Occasional Keeper,” he shall be annually called in by the Principal Light-keeper to do duty for a fortnight in the month of January; and the same shall be stated in the Monthly Letter.

17. The Principal Light-keeper is held responsible for the regularity of the Watches throughout the night, for the cleanliness and good order of the Reflecting or Refracting Apparatus, Machinery, and Utensils, and for the due performance of the whole duty of the Light-room or Light-rooms, as the case may be, whether performed by him personally, or by the Assistant.

18. The Principal Light-keeper is also held responsible for the good order and condition of the Household Furniture belonging to the Lighthouse Board, as well in his own as in the Assistant’s house. This duty extends also to the cleanliness of the several apartments, passages, stairs, roofs, water-cisterns, store-rooms, work-shops, privies, ash-pits of the dwelling-houses, offices, court, and immediate access to the Lighthouse.

19. The Light-keepers shall endeavour to keep in good order and repair the Dykes enclosing the Lighthouse grounds, the Landing-places, and Roads leading from thence to the Lighthouse and the Drains therewith connected, together with all other things placed under their charge.

20. When stores of any kind are to be landed for the use of the Lighthouse, the Light-keepers shall attend and give their assistance. The Principal Light-keeper must, upon these occasions, satisfy himself, as far as possible, of the quantity and condition of the stores received, which must be duly entered in the Store-book and Monthly Return-book.

21. The Light-keepers are to make a Report of the quality of the Stores, in the Monthly Return for March annually, or earlier should circumstances render this necessary; and this Report must proceed upon special trial of the several Cisterns of Oil and of the other Stores in detail, both at the time of receiving them and after the experience of the winter months.

22. At all stations where Peat Fuel is in use, there must be such a quantity of Peats provided, that the Stock of the former year shall be a sufficient supply to the end of the current year.

23. Should the supply of any of the Lighthouse Stores at any time appear to the Principal Light-keeper to be getting short, so as thereby to endanger the regular appearance of the Light, he shall immediately intimate the same to the Engineer, and he must be guided by prudence in reducing the stated number of Burners until a supply be received.

24. The Light-keepers are prohibited from carrying on any trade or business whatever. They are also prohibited from having any boarders or lodgers in their dwelling-houses, and from keeping dogs at the Lighthouse establishments.

25. The Light-keepers are also directed to take care that no smuggled goods are harboured or concealed in any way in or about the Lighthouse premises or grounds.

26. The Light-keepers have permission to go from home to draw their salaries, and also to attend church. The Assistant Light-keeper, on all occasions of leave of absence, must consult the Principal Light-keeper as to the proper time for such leave, and obtain his consent; in like manner, the Principal Light-keeper shall duly intimate his intention of going from home to the Assistant Light-keeper;--it being expressly ordered that only one Light-keeper shall be absent from the Lighthouse at one and the same time.

27. While the Principal Light-keeper is absent, or is incapacitated for duty by sickness, the full charge of the Light-room duty and of the premises shall devolve upon the Assistant, who shall in that case have access to the keys of the Light-room stores, and be held responsible in all respects as the Principal Light-keeper; and in the case of the incapacity of either Light-keeper, the assistance of the Occasional Light-keeper shall be immediately called in, and notice of the same given to the Engineer. Notice of any such occurrences to be taken in the Monthly Return, or by special letter to the Engineer, should circumstances render this necessary.

28. The Light-keepers are required to be sober and industrious, cleanly in their persons and linens, and orderly in their families. They must conduct themselves with civility to strangers, by shewing the premises, at such hours as do not interfere with the proper duties of their office; it being expressly understood, that strangers shall not be admitted into the Light-room after sunset. But no money or other gratuity shall be taken from strangers on any pretence whatever.

29. The Light-keepers are to appear in their Uniform-dress when any of the Commissioners or Principal Officers visit a station, and also on Sunday;--on which day, at noon, the weather permitting, the Lighthouse flag shall be hoisted by the Assistant Light-keeper, or in his absence by the Principal Light-keeper, when it shall remain displayed until sunset.

30. These Instructions are to be read in the Light-room by the Principal Light-keeper, in the hearing of his Assistant, on the term days, before drawing his salary; and notice thereof taken in the Monthly Returns.

31. In the event of any neglect occurring in the performance of any part of the duties required from a Light-keeper, the offending party shall, _jointly_ with the other Light-keeper or Light-keepers at the station, send immediate notice of the circumstance to the Engineer; and in the event of one party refusing or neglecting to concur in giving this intimation, the others (whether Principals or Assistants) shall proceed to give the notice in their own names.

32. The breach of any of the foregoing Rules and Instructions shall subject the Light-keepers to dismissal, or to such other punishment as the nature of the offence may require.

33. It is recommended that the Principal Light-keeper, or other Principal Officer at the respective Lighthouses for the time being, shall, every Sunday, perform the service pointed out for the inmates, by reading a portion of the Scriptures, and any other religious book furnished by the Board, and the Prayer composed for their use by the Rev. Dr Brunton, one of the Ministers of Edinburgh, or other Prayers in any work furnished by the Board. For this purpose, the Principal Light-keeper shall invite the families to assemble at noon in the Visiting Officer’s room.

34. The Light-keepers are to observe that the above general Regulations are without prejudice to any more special Instructions which may be made applicable to any particular Lighthouse, or to such orders as may from time to time be issued by the Engineer.

_ALAN STEVENSON, Engineer
for Northern Lighthouses._

NORTHERN LIGHTS OFFICE, EDINBURGH,
_16th June 1847_.

EDINBURGH, _16th June 1847_.

THE COMMISSIONERS having considered the preceding RULES and INSTRUCTIONS, approve of the same, direct them to be substituted for those now in use, appoint them to be signed by the Engineer, and copies of them and of this Minute to be issued to the present Light-keepers; direct a copy to be delivered in future to each Light-keeper at the time of his appointment, that they may understand that they are placed under the department and superintendence of the Engineer, who is held responsible for the strict observance of the Rules and Instructions, and for their general good conduct; that the Engineer has power, in case of neglect or disobedience, instantly to suspend and remove any of the Light-keepers, and to report the case to the Commissioners, by whom it will be considered, and the offending party subjected to dismissal, or such other punishment as the offence may merit. In case of a punishment less than dismissal, that circumstance, as well as the general conduct of the Light-keeper, will always be taken into consideration when any application may be made for superannuated allowance.

_Extracted from the Minutes by_

ALEX. CUNINGHAM, _Sec._

EDINBURGH:

PRINTED BY NEILL AND COMPANY, OLD FISHMARKET.

_PLATE_ I

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

CHART
Shewing the Situation of the
SKERRYVORE LIGHTHOUSE

Stevensons Account of Skerryvore Lighthouse]

_PLATE II._

_Engraved by W. & A. K. Johnston. Edinburgh._

CHART
of the POSITION of the
SKERRYVORE ROCKS
& FOULGROUND
_from a Survey made for the_
_COMMISSIONERS OF NORTHERN LIGHT HOUSES_
JAMES RITSON SURVEYOR
1846.

Stevenson’s Account of the Skerryvore Lighthouse.]

_PLATE_

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_William Miller, Sculp^{t}._

PLAN OF SKERRYVORE ROCK
_AT LOW WATER OF SPRING TIDES._
_Shewing the site of the Lighthouse Tower, Barracks, Cranes, fresh
Water Tanks, Railway &c._]

[Ilustration:

_N^{o}. III._

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_William Miller, Sculp^{t}._

PLAN OF SKERRYVORE ROCK
_AT HIGH WATER OF SPRING TIDES._]

PLATE IV.

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_G. Aikman Sc_

CURVES FOR LIGHTHOUSE TOWERS

PARABOLA CONCHOID LOGARITHMIC HYPERBOLA]

_W. & A. K. Johnston Sculp^{t}._

MARINE DYNAMOMETER, SMALL SIZE, LENGTH 18 INCHES.]

PLATE V.

_Stevenson’s Account of Skerryvore Lighthouse._

_Walter Ferrier Del^{t}._

_G. Aikman Sculp^{t}._

TEMPORARY BARRACK.

Barrack Room for Workmen
Engineer & Foreman’s Apartments
Kitchen & Provision Store
Store for Coals &c.]

PLATE VI.

_Stevenson’s Account of Skerryvore Lighthouse._

_Walter Ferrier Del^{t}._

_G. Aikman Sculp^{t}._

Elevation

Fig. 1

TEMPORARY BARRACK.

TOP FIXTURES.

Plan

Fig. 2]

PLATE VII.

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_William Miller, Sculp^{t}._

ELEVATION.]

PLATE VIII.

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_William Miller, Sculp^{t}._

SECTION.

84th. Course

94th. Course

32d. Course

28th. Course

1st. Course

19th. Course]

PLATE IX.

_Stevenson’s Account of Skerryvore Lighthouse._

_G. H. Slight Del^{t}._

_W. H. Lizars Sculp^{t}._

_BALANCE CRANE USED AT SKERRYVORE._

_Elevation_

_Plan_

_Section shewing Rollers_

_Plan of Rollers_

_Plan of Pedestal & Frame Circle_

_End view of Crane_]

_PLATE X._

_Engraved by W. & A. K. Johnston, Edinburgh._

PLAN
of ESTABLISHMENT at
HYNISH, ISLAND OF TYREE.
_SHEWING THE_
PIER, DOCK, RESERVOIR, LIGHTKEEPERS AND SEAMENS HOUSES &c.

NOTE
_The Soundings are marked in a fractional form thus ³²⁄₂₀ in which the
figures in the place of the Numerator indicate the depth at high
water of spring tides and those in the place of the Denominator the
depth at low water of spring tides, the rise of tide being 12 feet._

_Stevensons account of the Skerryvore Light House_]

PLATE XI.

_Walter Ferrier, Del^{t}._

_William Miller, Sculp^{t}._

HYNISH DOCK.

_Elevation._

_Section across Gates._

SINGLE BOOM]

_PLATE XII_

_J. L. Kerr, del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

ANNULAR LENS OF FIRST ORDER

SCALE ¹⁄₈^{th}.. FULL SIZE

PLAN

SECTION THROUGH A.B.

TABLE OF ELEMENTS OF LENS
IN MILLIMÈTRES

+-----+---------+---------+-----------------+
| | | | CO-ORDINATES TO |
| | | | CENTRES OF |
| | RADIUS | RADIUS | CURVATURE |
| | OF | OF +--------+--------+
|N^{o}|PERIPHERY|CURVATURE| _x_ | _y_ |
+-----+---------+---------+--------+--------+
| 1 | 140.00 | 483.50 | 454.79 | 00.00 |
| 2 | 208.15 | 543.60 | 488.55 | 13.08 |
| 3 | 262.40 | 598.62 | 513.38 | 31.72 |
| 4 | 309.20 | 659.77 | 540.71 | 57.00 |
| 5 | 350.50 | 719.84 | 565.27 | 84.86 |
| 6 | 387.44 | 779.48 | 588.00 | 114.93 |
| 7 | 422.23 | 846.45 | 614.35 | 151.50 |
| 8 | 456.23 | 911.30 | 636.90 | 189.55 |
| 9 | 490.00 | 980.30 | 660.11 | 250.17 |
| 10 | 523.33 | 1057.70 | 683.41 | 280.60 |
| 11 | 553.33 | 1136.01 | 712.79 | 328.00 |
+-----+---------+---------+--------+--------+]

_PLATE XIII_

_G. H. Slight Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

REVOLVING
DIOPTRIC APPARATUS
FIRST ORDER.
ONE TWENTIETH OF FULL SIZE.]

PLATE XIV.

_Stevenson’s Account of Skerryvore Lighthouse._

_G. Aikman, Sculp^{t}._

REVOLVING DIOPTRIC LIGHT OF THE FIRST ORDER.

_Plan_]

PLATE XV.

_Stevenson’s Account of Skerryvore Lighthouse._

_G. Aikman, Sculp^{t}._

FIXED DIOPTRIC LIGHT OF THE FIRST ORDER.

_Vertical Section._]

PLATE. XVI.

_Stevenson’s Account of Skerryvore Lighthouse._

_J. Andrews Del^{t}._

_W. H. Lizars Sculp^{t}._

1^{st}.
ORDER of LIGHTS.

_CONCAVE MIRRORS._]

_Stevenson’s Account of Skerryvore Lighthouse._

PLATE XVII.

FIXED
CATADIOPTRIC LIGHT
OF 1^{st}. ORDER

ONE NINETEENTH OF FULL SIZE

REFERENCES.

A B C. CATADIOPTRIC ZONES.

D E F. COMPOUND DIOPTRIC BELT WITH DIAGONAL JOINTS C N M.

A′ B′ C′. LOWER CATADIOPTRIC ZONES ONE DIVISION BEING LEFT OUT FOR
FREE ACCESS TO THE LAMP.

F. FOCUS WITH FLAME OF LAMP.

REFERENCES.

X X X. DIAGONAL SUPPORTS FOR THE UPPER CATADIOPTRIC ZONES.

H H. SERVICE TABLE ON WHICH THE LAMP RESTS & WHERE THE KEEPER STANDS
TO TRIM THE BURNER.

R R. DIAGONAL FRAME FOR CARRYING THE APPARATUS.

_James Andrews, Del^{t}._

_William Miller, Sc._]

PLATE XVIII.

_Stevenson’s Account of Skerryvore Lighthouse._

_G. H. Slight Del^{t}._

_W. H. Lizars Sculp^{t}._

1^{st}.
ORDER of LIGHTS.

_FIXED
CATADIOPTRIC
APPARATUS._]

PLATE XIX.

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

CATADIOPTRIC APPARATUS.

FOURTH ORDER]

PLATE XX

_Stevenson’s Account of Skerryvore Lighthouse._

_Walter H. Ferrier, del^{t}._

_Engraved by W. & A. K. Johnston Edin^{r}._

MECHANICAL LAMP
for
DIOPTRIC LIGHTS
of
FIRST ORDER.

A WICK HOLDERS
B GLASS HOLDER
C SCREW TO RACK D FOR RAISING WICK
D RACK FOR D^{o}.
E PIPE SUPPLYING OIL TO WICKS
F COLLAR SUPPORTING BURNERS
G DRIP CUP
H RETURN PIPE FOR OIL OVERFLOWING BURNER
I VALVE BOX
J CRANK RODS FOR WORKING LEATHER VALVES
K HINGE OF LID
L LID OF CISTERN
M OIL CISTERN
N SUCTION PIPE
O WINDING ARBOUR FOR MACHINE
P BOX FOR MACHINERY
Q SCREW FOR ADJUSTING LEVEL OF BURNER
R SERVICE TABLE
S COUPLING SCREW FOR OIL TUBE
T UNIVERSAL JOINTS FOR CONNECTING ROD
U CRANE FOR EMPTYING CISTERN
V CONNECTING ROD FOR CRANKS]

PLATE XXI

_Stevenson’s Account of Skerryvore Lighthouse._

_Walter H. Ferrier, del^{t}._

_Engraved by W. & A. K. Johnston Edin^{r}._

MECHANICAL LAMP.
ENLARGED VIEWS
OF OIL PUMPS.

ELEVATION

J SUPPORTS OF BURNER
P CRANK RODS FOR LEATHER VALVES
M N SUPPORTS FOR CRANK RODS
L COUPLING
T UNIVERSAL JOINT
P CONNECTING ROD FOR CRANKS
S SUCTION PIPE
O SQUARE TRAY FOR OVERFLOWING OIL
Q LID OF OIL CISTERN
I OIL TUBE

PLANS AND SECTIONS IN REFERENCE TO OPPOSITE PLATE.

SECTION ON LINE A. B.

SECTION OF DISCHARGING CHEST E.

PLAN OF UPPER SIDE OF PUMP CHAMBER AT F. F.

PLAN OF VALVES AT F. F. AND H. H.

SECTION ON LINE C. D.

PLAN AND SECTION OF PLATE K.

PLAN OF LOWER SIDE OF PUMP CHAMBER AT H. H.]

_PLATE XXII_

_Walter H. Ferrier, del^{t}._

_Engraved by W. & A. K. Johnston, Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

MECHANICAL LAMP
ENLARGED VIEWS
OF OIL PUMPS.

ELEVATION

FRONT VIEW OF LEATHER PISTONS
AND LEVERS WORKING INTO PUMP

J SUPPORTS OF BURNER
P CRANK RODS FOR LEATHER VALVES
M N SUPPORTS FOR CRANK RODS
L COUPLING
T UNIVERSAL JOINT
R CONNECTING ROD FOR CRANKS
S SUCTION PIPE
O SQUARE TRAY FOR OVERFLOWING OIL
Q LID OF OIL CISTERN
I OIL TUBE

PLAN]

_PLATE XXIII_

_Walter H. Ferrier Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

CLOCKWORK MOVEMENT OF MECHANICAL LAMP

PLAN OF CLOCKWORK

SIDE VIEW OF CLOCKWORK]

_PLATE XXIV_

_James Andrews, del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

CLOCKWORK MOVEMENT AND BURNER OF MECHANICAL LAMP

SECTION OF BURNERS

ELEVATION OF WICKHOLDER

ELEVATION OF INNER TUBE OF GLASS GALLERY

PLAN OF BURNERS

PLAN OF THE LOWER SIDE OF BURNERS
SHEWING THE HANDLES OF THE RACKS FOR ELEVATING THE WICKS

A. UNIVERSAL JOINT OF PUMP ROD
B. REGULATOR
C. CHAIN BARREL
D. CHAIN
E. DRIVING WHEEL
F. BEVEL WHEELS FOR HORIZONTAL MOTION
G. WHEEL WITH COGS FOR LIFTING BELL-HAMMER
H. HAMMER FOR STRIKING ALARUM BELL
I. ALARUM BELL WHICH REPEATS WHILE THE PUMP IS WORKING
K. ENDLESS SCREW ON AXIS OF REGULATOR
L. WINDING ARBOUR

END VIEW OF CLOCKWORK]

PLATE XXV.

_Stevenson’s Account of Skerryvore Lighthouse._

_G. Aikman, Sculp^{t}._

FLAME
FOR 1^{st}. ORDER OF
DIOPTRIC LIGHTS
at full size.]

_PLATE XXVI_

_James Andrews Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

LANTERN
1^{ST}. ORDER OF LIGHTS.

PARAPET WALL

ELEVATION & SIDE VIEW OF UPPER PARTS OF
ASTRAGALS

ELEVATION & PLAN OF HORIZONTAL
PARTS OF ASTRAGALS

ENLARGED SECTIONS OF ASTRAGALS

ENLARGED SECTION OF CORNICE

ELEVATION & SIDE VIEW OF LOWER
PARTS OF ASTRAGALS

ENLARGED SECTION OF
SOLE PLATE & ASTRAGAL]

PLATE XXVII.

_Stevenson’s Account of Skerryvore Lighthouse._

_James Andrews, Del^{t}._

_William Miller, Sculp^{t}._

ARDNAMURCHAN LIGHTHOUSE.]

PLATE XXVIII.

_Stevenson’s Account of Skerryvore Lighthouse._

_H. G. Slight del^{t}._

_G. Aikman Sculp^{t}._

ARDNAMURCHAN LIGHTHOUSE.

PLAN]

_PLATE XXIX_

_James Andrews Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

FLOATING LIGHT VESSEL

Reduced from Drawings in possession
of Honb^{le}. Corporation of Trinity House
Deptford Strond.

DIMENSIONS
F^{t}. In.
Length between the perpendiculars 80·0
Breadth moulded 20·6
D^{o}. extreme 21·0
Depth in hold 10·8

Burthen in Tons 158⁹⁄₉₄]

_PLATE XXX_

_G. H. Slight Del^{t}._

_Engraved by W. & A. K. Johnston Edin^{r}._

ELEVATION OF COVESEA SKERRIES BEACON.

_N. B. The Letters refer to those in Plate XXXI._

_Stevenson’s Account of Skerryvore Lighthouse._]

_PLATE XXXI_

_G. H. Slight. Del^{t}._

_Engraved by W. & A. K. Johnston Edin^{r}._

COVESEA SKERRIES BEACON

_Plan on c d_

_Plan on a b_

_Section
showing
connection of
cage with
main Pillars_

_Plan on e f_

_Section
showing
connection
of Pillars_

_Section showing
attachment of Pillars
to the Sole plates
and its connection
with Rocks
by Bats_

_Connecting Plate_

_Plan on g h_

_Stevenson’s Account of Skerryvore Lighthouse._]

_PLATE XXXII_

_James Andrews Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse_

STONE BEACON

ELEVATION

SECTION

IRON BEACON

ELEVATION

SECTION]

_PLATE XXXIII_

_James Andrews Del^{t}._

_Eng^{d}. by W. & A. K. Johnston Edin^{r}._

_Stevenson’s Account of Skerryvore Lighthouse._

BUOYS

MAST BUOY

CAN BUOY

CASK BUOY

NUN BUOY

_FOR WRECKS_

SPHERICAL BUOY

NELSON BUOY

_RIVER RIBBLE_

FAIRWAY BUOY

_RIVER TAY_]

Transcriber’s Notes

Inconsistent, archaic spelling, hyphenation, typography etc. have
been retained, also in proper and geographic names and in numbering
of illustrations and plates, except as listed under Changes below.
Depending on the hard- and software used and their settings not
all elements may display as intended.

The book regularly refers to a book published by the
author’s father: An Account of the Bell Rock Light-House by
Robert Stevenson, which is available at Project Gutenberg:
https://www.gutenberg.org/ebooks/48414.

Page xi: the errata have already been corrected in the text; see also
under Changes made below.

Page 149, ... the same mass of Mull stone would weigh 4252 tons ...:
possibly an error for 4152 tons (which would make the calculation
correct).

Page 174: ... somewhat on the same plan as that which is described
in the Appendix ...: it is not clear to which Appendix this refers;
possibly the reference is to Plate XXXI.

Page 252 ff.: Figures 59 and 60 are identical.

Page 271 ff.: Figures 71 and 72 are identical.

Page 276, See fig. 73 and the following paragraph: the description
appears to refer to Fig. 71/72 rather than to fig. 73.

Page 362, Conversely, n′ is the origin of the co-ordinates for the
grinding centre O of the interior convex refracting surface BC, ...:
in the illustration (Fig. 110) this appears to be a lower case o.

Page 389, entries for May 14 and 15, 1844: the order as given here is
the one printed in the source document; the reason for the inverse
order is not clear.

Page 422, item Charities &.c, number 2: Since last Act: there appears
to be a discrepancy between the individual amounts paid out and the
sub-total given.

Changes made:

Footnotes, illustrations and tables have been moved outside text
paragraphs; marginalia have been moved to directly above the
paragraphs they refer to. Some of the wider tables have been split
into chunks in order to fit the available width; such split tables
may be recombined into single tables (hence there are occasional
blank lines and columns in these split tables). In certain tables,
Do. or do. have been replaced with the dittoed text.

Some obvious minor typographical and punctuation errors have been
corrected silently. Some minor oddities in text lay-out have been
changed silently for easier readability.

Repeated table and column headers, carry/brought forward, subtotals
etc. on page transitions in lists and tables have been removed,
except partly on the transition from page 423 to 424.

Suter and Souter have been standardised to Suter.

Page xi: the errata listed have already been corrected in the text.
The amount L.93,306 : 8 : 10 does not occur on line 6 of page 178;
the amount L.90,268, 12 : 1 that does occur on line 7 of that page
has been replaced by L.86,977 : 17 : 7 as given in the Appendix (page
384).

Page 61, Footnote [13]:

G·M
... will be ----, by which expression ...
G·M′

changed to

G·M
... will be -----, by which expression ....
G′·M′

Page 231: In these figures, n n shews the reflector flame ... changed
to In these figures, n n shews the reflector frame ....

Page 267: François Soliel, whom I urged ... changed to François
Soleil, whom I urged ...; ... the light derived from the accessary
part ... changed to ... the light derived from the accessory part ....

Page 281: OA = ρ . cos . OAX. changed to OA = ρ . cos OAX.

Page 284: F is the small flame in the focus ... changed to E is the
small flame in the focus ....

Page 413, entry The Commission paid to Collectors ...: £2401 : 7 :
0⁴⁄₈ changed to £2401 : 7 : 3⁴⁄₈ cf. page 429.

Page 430, entry 9. Startpoint, Balance: 462 0 8⁶⁄₈ changed to 462 0
3⁶⁄₈.

Page 355: ... forming a flat parallelopepid ... changed to ...
forming a flat parallelopiped ....

Page 399, entry Drum Sand West Buoy, South Point: Bear changed to
Bearing.