AMERICAN 
OURNAL OF SCIENCE AND ARTS. 
[SECOND SERIES.] 
ie tid een tn Koby tie Operations of the U. &. 
orce Maruror, Electrotypist: being a 
oat “i mcr : + Saves, Assistant in charge of the Coast 
Survey Office.* With a Plat 
and processes here err are entirel 
hibit the advantages derived from tie introduc- 
it will be necessary to consider the scientific principles in- 
d in their use, and ome to take a cursory view of the his- 
of the electrotyping ar 
€ art of working sbeies by electric currents is of very re- 
; ‘introduction and although it has advanced with great ra- 
, tis yet, perhaps, in a state of infancy in its applications, 
crudeness in the modes of conducting it. 
 Clectro-deposition of metals was observed by most experi- 
With the voltaic battery. As early as 1804 electro-gild- 
been successfully practised ; pri rong idea of making 
by electric currents does not se o have occurred to 
one previous to the intrdtion of, Daniel’s battery, to 
lectro-casting i is incident 
T the introduction of art battery, it simultaneously 
to several persons that electric currents might be u 
Dated Hlsirotype Laboratory, Coast Survey Office, a November 29, 
as Appendix 55 to Senate Document, N 
Sums, Vol. XV, No. 45.—May, 1853. 40 
jou 
