directly through the tube, k, in order to distill the acetic acid that
still remains in the residuum, and which passes thus through the tube,
e, into the worm, h, and flows into the two-necked bottle, S.

There may be added to the boiler, C, certain materials for purifying the
acetic acid, such as permanganate of potassa or acetate of soda, so as
to obtain an absolutely pure article.--_Dingler's Polytech. Journal_.

* * * * *




FIELD KITCHENS.


We illustrate the field kitchens of Captain J.C. Baxter, R.E., in the
Inventions Exhibition. Figs. 1 to 3 represent Captain Baxter's
Telescopic Kitchen, both open for use and packed up for traveling. These
kitchens, which are on an entirely new principle, consist of from three
to five annular kettles, either circular or elliptical, which are placed
one on another, and the fire lighted inside the central tube. The
kettles are built up on the top of the outer case in which they are
carried, the central tube being placed over the grate in the lid. A
small iron stand, supporting an ordinary pot, is placed on the top. When
packed up, the annular kettles fit or nest into each other, and into the
outer case; the iron stand packs inside the innermost kettle, and the
top pot is placed on the outer case, being secured by a strap. This form
of kitchen is intended for the use of officers, both regular and
volunteer, and for officers' and sergeants' messes on active service or