﻿Prof, von Kobell upon Galvanography. 



245 



Fig. 7, the leaden disc which is laid on the plate of zinc ; the 

 strip proceeding from the disc is to be connected with the strip 

 proceeding from the base, fig. 4 ; by the application of the bind- 

 ing screw shown in fig, 8. 



Fig. 7. 



Fig. 8. 



^ 



I 



J 



Fig. 9, a glass rod bent so as to form a triangle to be laid upon 



It is on this triangle that 



the membrane forming the tamborine. 



the zinc plate rests. For heavy zinc plates, a hooked support of 

 copper wire, as shown in fig. 10, is to be used. This wire sup- 

 port may be coated with wax. 



Fig. 10. 



Fig. 9. 



Fig. 11, a pair of copper 

 or iron pincers for remo- 

 ving the plates from the 

 cupreous solution. 



Fig. 12 and figure 13, 

 show the apparatus when 

 the circuit is closed ; aa 

 is the base-plate, fig. 4; 

 bb the painted plate ; the 

 tamborine is shown above, 

 in which cc the glass tri- 

 angle, dd the zinc plate, 

 and e the leaden disc, are 

 seen above each other ; the 



Vol. xlviii, No. 2.— Jan.-Marcb, 1645. 



Fig. 11 



Fig. 12 



32 









