V.

Vaal River, 701.

Valentine, electric, 581.

Valve, throttle, 6. slide, 8.

Vegetable nature of coal, 753.

VELOCITY OF LIGHT, 384.

Venice, view in, 396.

Vetterli rifle, 189.

Victoria, Australia, gold-field of, 688.

Victoria Bridge, Montreal, 282.

_Victoria_, H.M.S., 166, 168.

Vision, persistence of, 476.

VISUAL IMPRESSIONS, 468.

Voltaic element, 490.

Vulcanite, 728.

Vulcanized india-rubber, 727.

W.

Wall papers, machines for printing, 322.

Walter press, 323.

Warner’s torpedo experiment, 241.

Warren girder, 280.

_Warrior_, H.M.S., 150.

Warships, new types of, 167.

Water decomposed by electricity, 498.

Waterproof cloths, 726.

Watt, 3, 4, 8, 14.

Welding, electric, 537.

Wells, Horace, 735.

Welsbach incandescent gas lights, 777.

Whaleback, 147.

Wheatstone, 387, 470, 474, 552. and Cooke’s telegraph, 548, 554.

Wheatstone’s automatic telegraph, 564. dial telegraph, 568. dot signals, 565.

Wheels of railway carriages, 107.

Whitehead’s torpedoes, 232, 242.

Whitworth’s guns, 193. rifle, 182.

Wire-drawing for Atlantic cables, 576.

Wireless telegraphy, 546.

Woodbury printing process, 641. process for engraving photographs, 643.

Woolwich, 27. “infants,” 201.

Work, 11, 12, 160, 325, 804.