Scientific American, Vol. XXXIX.—No. 24. [New Series.], December 14, 1878: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and ManufacturesVarious
Science
Scientific American, Vol. XXXIX.—No. 24. [New Series.], December 14, 1878: A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures
Various
Science -- Periodicals; Technology -- Periodicals
A very simple method of reducing nitrate of silver, analagous to
that some years ago mentioned by the late Mr. Hadow, is given in the
_Archiv der Pharmacie_, by Mr. C. F. Chandler. If crystallized or
fused nitrate of silver be placed upon glowing charcoal, combustion
forthwith takes place, the silver remaining behind in a metallic
form, while nitrous oxide and carbonic acid are freely given off. The
nitrate of silver is fused by the heat developed by the reaction,
and is imbibed through the pores of the charcoal; as every atom of
consumed carbon is replaced by an atom of metallic silver, the original
form and structure of the charcoal are preserved intact in pure
silver. By proceeding in this manner it is possible to produce silver
structures of any desired size, possessing in every way the original
form of the wood. A crystal of nitrate of silver is in the first place
put upon a piece of charcoal, and a blowpipe flame is then applied in
the vicinity, in order to start the reaction in the first instance,
and as soon as combustion commences crystal after crystal may be
added as these, one after another, become consumed. The silver salt is
liquefied, and penetrates into the charcoal, where it becomes reduced.
Pieces of silver may in this way be prepared, of one or two ounces in
weight, which exhibit all the markings and rings of the original wood
to a most perfect and beautiful degree.
* * * * *
NEW AGRICULTURAL INVENTIONS.
Mr. Charles E. Macarthy, of Forsyth, Ga., has patented an improved
Horse Power, designed more particularly to be located beneath a gin
house for ginning cotton, but applicable for all purposes for which a
horse power is ordinarily employed.
An improved Corn Planter has been patented by Mr. Thomas A. Sammons,
of Lewisburg, West Va. This corn planter is designed to plant the
corn in straight rows both ways and at varying distances apart. It
is constructed upon the general principle of a reciprocating slide,
passing alternately beneath a hopper, and carrying a number of grains
from beneath the same to a discharge outlet.
An improved machine for Cutting the Bands of Gavels or bundles of
grain, and feeding the same to the cylinder of a thrasher, has been
patented by Mr. James M. O'Neall, of Fort Worth, Texas.
An improved Sulky Breaking Plow has been patented by Mr. Edward T.
Hunter, of Hallsville, Ill. This is an improved sulky attachment for
breaking plows, which is so constructed as to receive any ordinary
plow; it may be adjusted to cause the plow to work deeper or shallower
in the ground, and will allow the plow to be turned to either side.
Mr. Osman C. Du Souchet, of Alexandria, Mo., has invented an improved
Check Row Corn Planter and Drill, which is so constructed that its
operating mechanism may be at all times under the control of the
driver. It will plant the corn in accurate check row, and is easily
controlled.
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