Twain, Mark, on Mississippi steamers, 259, 260 Twin-screw, evolution of, 163; introduction of “overlapping,” 169; of the _Kaiser Wilhelm der Grosse_, 175; of _Adriatic_, 207; influence of on steering capacity, 318 Twin-ships, 225 Types of steamships, 283–7 _Umbria_, the, 158–9, 161, 162, 163, 165, 212 Union-Castle Line, 216; ships of, 219 Union Line, 216 _Vanadis_, the, 280 Ventilation, methods of, 327 Veranda café of _Lusitania_, 301 Vertical trunk engine, 134 _Vespasian_, the, 189 _Victoria_, the, 131 _Victoria_, the (P. & O.), 163 _Victoria and Albert_, the, 277 _Victorian_, the, 190 _Vigilant_, the, 241 _Virginian_, the, 190, 191 Vulcan Yards, Hamburg, 212 _Waesland_ (ex _Russia_), 150 _Wakiva_, the, 280–1 _Waratah_, the, 182 Water-ballast, tanks of cantilever-framed ships, 249; for yachts, 274; tanks for, 315 Water-tight doors of _Oceanic_, 153; Stone-Lloyd system, 191 Watson, G. L., 270 Watt, James, 33; early engine of, 34; association with Boulton, 35; beam engine, 36; “sun-and-planet” gear, 37; rotary engine, 37; invention of fly-wheel, 38; “horse-power” calculations of, 39; anecdote of, 82; invention of condenser, 135, 136 Watt, James, & Co., 140 Watt, James, Junr., and steamships, 84 Wave-line theory, 131, 133 Waves, action of, 98 “Well-deck” type, 284–5 West Indies, inauguration of mail service to, 110 Weymouth and Channel Islands Steam Packet Co., 228 “Whale-back” steamer, 265 White, Sir William H., 197, 203 White Star Line, first steamships of, 151; Atlantic competition, 151–5, 168; “intermediate” ships of, 178; recent ships, 193–4, 206–7, 209, 211; sailing ships of, 215; freight and live-stock steamers, 219 Wigram and Green, 93 _William Facwett_, the, 114 Williams and Guion, 155, 212 Williamson, Capt. J.: “The Clyde Passenger Steamer: Its Rise and Progress during the Nineteenth Century,” 78 Williamson’s “Memorials of James Watt,” 83 Wilson, Thomas, & Sons, 216 Wireless telegraphy on _Campania_ and _Lucania_, 171; on P. & O. ships, 218; on cross-channel boats, 226; usefulness of, 229; on yachts, 271; on liners, 306; instances of utility of, 307–8 _Wittekind_, the, 295 Wood, John, & Co., and the _Comet_, 78 Worcester, Marquis of, 9, 10, 18, 20 Yacht, the steam, Royal Yacht Squadron and, 266–8; Northern Yacht Club and, 267; Robert Napier and, 267; development of, 269; the _Sunbeam_, 270; lines of, 270; decks of, 272; fittings of, 273; engines and ballast, 274; Royal, 277–8; the _Sagitta_, 278; the _Triad_, 278–9; noted yachts, 280–1 Ymuiden Tug Company, 237 _Zwarte Zee_, the, 236 PRINTED BY CASSELL & COMPANY, LIMITED, LA BELLE SAUVAGE, LONDON, E.C. Transcriber’s Notes