AMERICAN INSTITUTE. 481 



Mr. Tillman. — The common table knife is now electrotyped silver, to 

 keep it bright ! 



Mr. Wilmarth. — All that is done under the Elkington patent. 



Mr. Goodwin. — In 1851, our books explain and teach some of these pro- 

 cesses. 



Mr. Butler, — We cannot consent to step backward to 1851 ; progress 

 since has overshadowed it. 



Mr. Stetson. — How is it as to electro deposits of other materials than 

 our pure metals ? 



Mr. Filmer. — The study here is endless ! I have been through much 

 experiment. Iron is hard to deposit ; cannot be relied on. I cannot de- 

 posit nickel, nor aluminium ! Antimony is easiest. 



Dr. Isaiah Deck. — Can specular metal be deposited ? It is believed so ! 

 I think it can, and be of very great importance in such telescopes as that 

 of Lord Rosse. Brass, which is a compound as well as specular metal, can 

 be deposited, so can bronze. 



Mr. Seeley. — Spencer and Jacobi, were first in the electrotype. We 

 Americans claim much. I perhaps the forty-ninth man out of the fifty 

 claimants here ! But it was quite perfect in England before we had it. 

 Spencer first used wax, not Jacobi ; and Murray used the black lead ! AVe 

 had Elkington's works at our Crystal palace ! It is more extensively used 

 in the manufactures of England, than any other country. 



Mr. Haskell. — It was used ten years ago in Napier's best work. 



Mr. Seeley. — Can silver leaf be used over the wax ? 



Mr. Filmer. — It was patented, but was a perfect failure ! The type broke 

 it to pieces, spoiling the process. Electrotyping plate for printing is an 

 American invention. 



Mr. Stetson. — Say art. 



Mr. Garbanati alluded to the large circulation of the London illustrated 

 papers, on electro plates. 



Prof. Hederick. — Are compounds of iron used ? 



Mr. Filmer. — After some manipulations. 



Mr. Everitt. — Great power being required — the hydraulic press is em- 

 ployed to stamp the cold wax. The warping of the plates by the heat is 

 difficult to avoid. Filmer is modest ! 



John Johnson. — My partner, Wolcott, attempted this electrotyping in 

 1837. 



Mr. R. L. Pell, made the following remarks on electrotyping, as applied 

 to the industrial arts : 



The electrotype process, appears to me to be of some value to those per- 

 sons engaged in the pursuit of organic analysis. 



When high temperatures are desired to effect difiicult combinations with 

 chromate of lead, or oxide of copper, as in the determination of carbon in 

 some samples of cast iron, the glass tube is very apt to soften, though made 

 of the best quality of glass, but may be strengthened by covering it with a 



[Am. Inst.J 31 



