VII. NAVAL ARCHITECTURE, ETC. 421 



Dimensions : length, 300 feet ; breadth, 94 feet ; depth, 42 feet. 

 Capabilities: will lift a vessel of 4,800 tons weight, drawing 27 feet of water. 

 Weight of dock, 2,800 tons. 



2148f. Picture of the " Great Western " steamship, the 



first steamer that traded regularly between England and America. 

 Date 1838. Maudslay, Sons, and Field, Engineers, Lambeth. 



2148g. A table of the first 50 Voyages of the " Great 

 Western " steamship. 



Maudslay, Sons, and field, Engineers, Lambeth. 



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. 



2149. Model of a Direct-acting Marine Steam Engine. 



Patented by J. Miller, A.D. 1841, No. 9,107. 



Lent from the Patent Office Museum by the Commissioners 

 of Patents. 



2150. Parent Steam Engine, made for Patrick Miller, Esq., 

 and used by him on the lake at Dalswinton, 1788. 



Bennet Woodcroft, Esq., F.R.S. 



For some years prior to 1787 Patrick Miller, Esq., of Dalswinton, Scotland, 

 had been engaged in a series of experiments with double and triple vessels 

 propelled by paddle-wheels, worked by manual labour. In the experimental 

 trips of 1786 and 1787 he was assisted by Mr. James Taylor (the tutor to his 

 younger sons), and at the suggestion of the latter it was determined to sub- 

 stitute steam power for manual labour. For this purpose, in the early part 

 of 1788, Taylor introduced William Symington, an engineer at Wanlockhead 

 Lead Mines, who had previously obtained letters patent (June 5, 1787, No. 

 1,610) for "his new invented steam engine on principles ' entirely new.' " 



An arrangement was made with Symington to apply an engine, constructed 

 according to his invention, to one of Mr. Miller's vessels, and consequently 

 the engine which forms the subject of this notice was made, the castings being 

 executed in brass by George Watt, founder, of Low Calton, Edinburgh, in 

 1788. At the beginning of October in that year the engine, mounted in a 

 frame, was placed upon the deck of a double pleasure boat, 25 ft. long by 

 7 ft., and connected with two paddle-wheels, one forward and the other abaft 

 the engine, in the space between the two hulls of the double boat. On the 

 steam being put in action it propelled the vessel along Dalswinton Lake at 

 the rate of 5 miles an hour. 



2151. Photograph of a water-wheel with paddles, floating by 

 itself, and capable of being utilised on streams and navigable 

 rivers. Professor Daniel Colladon, Geneva. 



A wheel on the above system has been at work for the last ten years on 

 the Rhone near Geneva, with satisfactory results. 



2152. Model, on a scale of 1 ^-inches to 1-foot, of the hori- 

 zontal condensing screw engines of H.M.'s Turret ship " Monarch/ 



