I claim the double screw herein described and shown, as a new article of
manufacture.


71,910.--APPARATUS FOR PRESERVING MEATS, FISH, POULTRY, AND OTHER
PERISHABLE ARTICLES.--Charles F. Pike, Piovidence, R.I.

I claim, 1st, Constructing a tubular ice box, with holes or openings in
the tubes or pipes, at or near the bottom, to let the air out into the
chamber, F, and slots or openings into the ice receptacle, reservoir, or
depository, near the top, and so get the combined and double purpose
of radiation, conduction, and internal circulation of the air in
the chamber, F, substantially as and for the purposes set forth and
described in the drawing and specification hereunto annexed, without
confining myself to any particular form, size, or shape of the pipes
or tubes, whether they be vertical or horizontal, round, square, oval,
oblong, or in any other form, neither do I confine myself to any
particular form of ice receptacle, reservoir, or depository.

2d, The perforating or making slots, holes, or openings in the tubes
or pipes, near the bottom, for the purposes set forth and described,
howsoever the same may be made, whether used in connection with the
ice receptacle, reservoir, or depository, as described, or without
the openings in the ice receptacle, reservoir, or depository, for the
purpose of the rotating of the air.

3d, The ice receptacle, reservoir, or depository, with its openings to
let the air into and on to the ice in this ice receptacle, reservoir, or
depository, for the purpose of taking off the moisture in the preserving
room, at or near its top, whether the tubes connected to the bottom of