DO aaa Scientific News. | [June 
For imbedding delicate objects, small cups made of tin-foil, 
pressed into shape in circular, tapering moulds, may satis- 
factorily employed with this apparatus, in the same way as the 
troughs. 
The device described above can be made by any coppersmith 
for about two dollars.— Fon A. Ryder. 
SCIENTIFIC NEWS. 
