Chapter V: Appendix

1. Table of Co-ordinates of Hyperbolic Column.

2. Notes on the Making of Paraboloïdal Mirrors.

3. Notes on the Grinding and Polishing of Dioptric Instruments for
Lighthouses.

4. Table of the Elements of the Catadioptric Zones for Lights of the
first order in the system of Augustin Fresnel.

5. Notice to Mariners of the Exhibition of the Skerryvore Light.

6. Detailed Account of the Expense of the Skerryvore Lighthouse.

7. Excerpts from Account of Experiments on the Force of the Waves of
the Atlantic and German Oceans, by Thomas Stevenson, F.R.S.E.,
Civil Engineer.

8. Annual List for 1848 of Lighthouses, Beacons, and Buoys, in the
District of the Northern Lights Board.

9. Annual Report by the Secretary as to the Income and Expenditure of
the Northern Lights Board for 1846.

10. Instructions to the Light-keepers in the Service of the
Commissioners of the Northern Lighthouses.

PLATES.

I. Chart shewing the situation of the Skerryvore Lighthouse.

II. Chart shewing the position of the Skerryvore Rocks and foul
ground.

III. Plans of the Skerryvore Rock at high and low water of spring
tides.

IV. Curves for Lighthouse Towers -- Marine Dynamometer.

V. Barrack of timber on the Skerryvore Rock.

VI. Details of fixtures of timbers at the top of the Timber
Barrack.

VII. Elevation of Skerryvore Lighthouse.

VIII. Section of Skerryvore Lighthouse.

IX. Balance Crane used at Skerryvore.

X. Plan shewing the Lighthouse Establishment of Barracks,
Harbour, &c., at Hynish, in the Island of Tyree.

XI. Elevation and Section entrance to Dock at Hynish.

XII. Plan and Section of Annular Lens.

XIII. Perspective Elevation of Revolving Dioptric Apparatus of First
Order.

XIV. Plan of Revolving Dioptric Light of First Order, with Mirrors.

XV. Vertical Section of fixed Dioptric Lights of First Order, with
Mirrors.

XVI. Elements of Concave Mirrors for Dioptric Lights of First
Order, and arrangement on the Frame.

XVII. Perspective View of Fixed Dioptric Light of First Order, with
Catadioptric Zones.

XVIII. Vertical Section of Fixed Dioptric Light of First Order, with
Catadioptric Zones.

XIX. Vertical Section of Catadioptric Light of Fourth Order, with
Framing.

XX. Elevation of Mechanical Lamp for Dioptric Lights of First
Order.

XXI. Enlarged Views of Oil-Pumps of Mechanical Lamp.

XXII. Enlarged Views of Oil-Pumps of Mechanical Lamp.

XXIII. Details of Clock-work of Mechanical Lamp.

XXIV. Details of Clock-work of Mechanical Lamp.

XXV. Flame of Mechanical Lamp of First Order at full size.

XXVI. Elevation of Diagonal Lantern, and details of Astragals.

XXVII. Elevation of Ardnamurchan Lighthouse.

XXVIII. Plan of Ardnamurchan Lighthouse.

XXIX. Lines of a Floating Light Vessel belonging to the Corporation
of Trinity House of Deptford Strond.

XXX. Elevation of Covesea Skerries Beacon.

XXXI. Details of Covesea Skerries Beacon.

XXXII. Elevations and Sections of Stone and Iron Beacons.

XXXIII. Elevations of Buoys.

ERRATA.

Page 52, line 8, _for_ Redelet _read_ Rondelet
... 178, line 6, _for_ L.93,306:8:10 _read_ L.86,977:17:7
... 292, line 30, _for_ radius rector _read_ radius vector
... 294, line 13, _for_ give _read_ gives
... 329, line 3, _for_ earth _read_ sea
... 347, line 29, _for_ Plate XXXII., _read_ Plate XXX.,

PART FIRST.

ACCOUNT OF THE SKERRYVORE LIGHTHOUSE.