IX. NAVAL ARCHITECTURE, ETC. 497 



2165. Drawing, on a f inch to 1 foot scale, of an Im- 

 proved Marine Tubular Boiler ; for high pressure. Designed 

 and patented by Messrs. J. and F. Howard. Made by the Barrow 

 Shipbuilding Co., Barrow-in-Furness. J. and F. Howard, 

 Engineers, Bedford. South Kensington Museum. 



The drawing shows a front view of the boiler, side elevation, longitudinal 

 section ; and a section through tube plates showing method of coning joints, 

 on a quarter full-size scale. 



2166. Drawing of Messenger's Patent High-pressure 

 Vertical Water-tube Boiler ; for steam yachts and launches. 

 Designed by Thomas Messenger about 1869. A. Verey and Co., 

 Engineers, Dover. South Kensington Museum. 



2167. Steam Donkey Engine and Pump, single-acting, 

 for feeding steam boilers with water. Alexander Wilson and Co., 

 Engineers, Vauxhall Works, Wandsworth Road, S.W. 



South Kensington Museum. 



Diameter of steam cylinder, 3^ inches ; stroke, 4 inches. Diameter of 

 pump, If inches. Will pump 460 gallons per hour, and feed a 30 h.p. 

 steam boiler. 



2157. High-pressure Non-condensing Screw Engine 



of 3 horse-power, for screw steam launches. Constructed on the 

 hammer or inverted cylinder principle. Diameter of cylinder, 5 

 inches. Stroke, 6 inches. A. Verey and Co., Engineers, Dover. 



South Kensington Museum. 



2153h. Pencil Drawing, by "William Van der Velde, Am- 

 sterdam, 1663-1707. Hull of the ship of war " Sovereign of the 

 Seas," 1687. Mr. G. Smith. South Kensington Museum. 



2178ehh. Model, Martin's patent self-canting anchors; 

 adopted by the British Government and fitted to H.M. ships 

 ' Devastation," " Thunderer," and others. C. Martin, King Wil- 

 liam Street, E.C. South Kensington Museum. 



218Ob. Model, in wood, on ^-inch scale of the "Lowe- 

 Vansittart " screw-propeller blades, as invented and fitted 

 in 1869 by Mrs. Henrietta Vansittart, for trial on board H.M.S. 

 " Druid," 350 horse-power. South Kensington Museum. 



2148d. Model of Screw Propeller, driven by a pair of 

 engines direct acting, having sun and planet motion, so as to give 

 the propeller two revolutions for every revolution of the engine. 



Glasgow Mechanics' Institution* 



2148h. Model of the sailing ship " Cairnsmore," length 

 223 ft., breadth 33 ft. 6 in., depth 20 ft. 6 in. ; tonnage, O.M. 

 1211. Built by John Reid and Co., Port Glasgow, for Messrs. 

 Nicholson and McGill, Liverpool, 1854. John Reid and Co. 



This ship made her first passage from Clyde to Bombay in 65 days. 

 40075. I i 



