VIII. MACHINERY. 47 1 



2026. Model of Large Iron Shears. Constructed by 

 Messrs. Day & Co., of Southampton, for the Government Dock- 

 yards. H.M. Commissioners of Patents. 



2027. Model of a Hoist or Lift. Patented by Thomas 

 Silver in 1872. The principle of this invention is applicable to 

 ascending gradients. H.M. Commissioners of Patents. 



2027a. Model of Spouts used in Sunderland Docks for 

 loading vessels with coal. River Wear Commissioners. 



2O27b. Model of Coal Drops used in Sunderland Docks 

 for loading steam colliers with coal. River Wear Commissioners. 



2027c. Model of Apparatus for raising Heavy Spherical 



Bodies. Bennet Woodcroft, F.R.S. 



2028. Original Traversing Lifting Jack. Patented by 

 George England in 1839. H.M. Commissioners of Patents. 



2029. Four original Models showing methods of con- 

 verting Rectilinear into Circular Motion as substitutes for 

 the crank. Patented by James Watt in 1781. 



H.M. Commissioners of Patents. 



2030. Bar Lathe used by James Watt. 



Bennet Woodcroft, F.R.S. 



2030a. Circular Rest, for turning spheres nearly up to 

 the full diameter of the lathe. The Rest being also adapted for 

 holding all kinds of plain tools or the " drill," (< universal," and 

 " eccentric " " cutting frames," &c., with overhead motion. In- 

 vented by the exhibitor. Tyssen Amhurst. 



203Ob. Spherical Chuck (with six extra collars), for 

 finishing spheres and chucking them for ornamental and other 

 purposes. Invented by the exhibitor. Tyssen Amhurst. 



2030c. Specimen in ivory turned by the above apparatus, 

 consisting of a series of spheres detached one within the other, in 

 Chinese fashion. Tyssen Amhurst. 



203Od. Specimen of ivory turned with the above circular 

 rest in conjunction with spiral apparatus, &c., by Mrs. Amhurst. 



Tyssen Amhurst. 



2032. Instrument for dividing and ruling the Brass Me- 

 ridian Rings of Globes, made by Jas. Ferguson, Esq., F.R.S. 

 (the astronomer). Bennet Woodcraft, F.R.S. 



2037. Photograph and Model representing an Hydraulic 

 Canal Lift at Anderton, in Cheshire, constructed by Messrs. 

 Emmerson, Murgatroyd, & Co., of Stockport and Liverpool, for 



