Chapter I: ENGINEERING AND MECHANICS.--Wrought Iron Bridge Designs

by WILLIAM O. DOUGLAS. A method of construction whereby the
safety of the structure is not dependent on any single member.
2 engravings.--Steel Wire Hawsers.

Health and Sewage of Towns; by ALFRED CARPENTER, M.D., C.S.S.
A practical experience of the Dry system.

Carlisle Bridge, Dublin, 1 engraving--Extinction of Fires.--Important
Dutch Enterprise.

Foot Bridge across the River Ness at Inverness; by C. R. MANNERS,
Engineer. 13 illustrations.

Radiating Steam Hercules for the St. Heliers' Harbor Works, Jersey.
2 figures.--New Meat Trucks.--New Horseshoe.--Scott's Wheel-Cutting
and Moulding Machine. 3 figures.

Compound Engine with Rope Driving Gear; by BENJAMIN GOODFELLOW,
Engineer. 3 engravings.--Differential Screw Pipe Joint.
6 figures.

Pipes for Gas and Other Purposes (continued from SUPPLEMENT No.
77). Main-laying continued, with 4 figures.--Fittings of Gas and
Water Pipes; Includes the average "life" of pipes; an account of
various soils, and amount of corrosion in each; Professor Barff's
new iron-preserving process, and other processes in practical use
for preserving iron pipe; proving pipe; the utility of various
metals, and directions for pipe-laying: various fittings,
illustrated in 16 figures.