VIII. MACHINERY. 479 



2086. Model of a Plummer-block. 



Bock and Handrick, Dresden. 



2087. Three Models of connecting Bod-ends. 



Bock and Handrick, Dresden. 



2088. Two Models of rivetted Joints for Boiler 

 Plates, to take to pieces. Bock and Handrick, Dresden. 



2089. Model of a Double-beat Valve. 



Bock and Handrick, Dresden. 



2090. Model of a Throttle Valve. 



Bock and Handrick, Dresden. 



2091. Model of a Cup Valve. 



Bock and Handrick, Dresden. 



2094. Drawing Instruments and Scales. 



Bock and Handrick, Dresden. 



2095. Tachometer with registering apparatus, after Dr. 

 Proll. Bock and Handrick, Dresden. 



Wood Model of Clutch Gear. Jeremiah Head. 



2O95a. Printing Machinery. This model of an ordinary 

 printing machine illustrates the inventions of Edward Cowper in 

 1818, and Augustus Applegath in 1823, as applied to the printing 

 of books, newspapers, &c., which had up to that time been com- 

 monly printed at hand presses. 



The distribution of the ink transversely as well as longitudinally 

 removed the difficulties previously felt, and gave perfect distri- 

 bution, and consequently good printing. Edward Alfred Cowper. 



2096. Model of Cowper's Cylinder Printing Machine. 



The Council of King's College, London. 



2O58. First Type-composing Machine, invented by 

 Alexander Mackie. 



John Maclauchlan, Dundee Free Library and Museum. 



Mr. Mackie's Type-composing Machine, of which this is the germ, is used 

 in offices of some of the London daily newspapers, and various books have 

 been printed by its aid. 



2058a. Type composing Machine. John Walter, M.P. 



2O58b. Type casting Machine, distribution being dis- 

 pensed with. John Walter, M.P. 



2097. Model of Revolving Screw, with Apparatus illustrative 

 of the Inclined Plane. The Council of King's College, London. 



