Chemistry and Physics. .. 423 
CC through the sulphuricacid, where it is thoroyghly dried, and out 
through the tube D. This is repeated until no more gas is disengaged ; 
hen the piece of wax.is removed from the tube E, and the airis drawn | 
h the apparatus by suction at D. When all the gas is out of the 
flask it is weighed; the loss of weight indicating the amount of CO2. 
the advantages which | think this form of apparatus has, are com- 
pactness, lightness, more convenient to weigh and in general easier in 
manipulation. 
Baltimore, Feb. 13, 1855. 
posed of one equivalent of acid and two equivalents of oxyd of the: 
alcohol radical. 
Afterwards Malaguti observed that an impure solution of the vinic 
ether sometimes decomposes, alcohol becoming free, and a bimucate 
of ethyl-oxyd or mucovinic acid is formed in the solution and may be 
Separated in the crystalline state. This acid forms salts with bases. 
; _Last winter in the laboratory of Prof, Erdmann at Leipsic, and at 
| his suggestion, | undertook the study of thé compounds of mucic acid 
/ with amyl-oxyd and communicate herewith the imperfect results of my 
Investigations which have been necessarily suspended. Applying amyl- 
alcohol in the process of Malaguti, I obtained a crystalline ether, but 
nly in a few of many trials, and w n operating on small quantities. 
| When, however, fuming hydrochloric acid was added to the mixture of 
. mucic acid, amyl-alcohol and oil of vitriol, and the whole digested at a 
| moderate heat for some hours. the new body was prepared without diffi- 
| culty. The brown semi-solid mass thus obtained was washed with alco- 
| ol so long as that Jiquid ran off colored, and was then several times 
recrystallized from hot alcohol or water. As thus obtained, this ether 
| usually appears in the form of a bulky opake mass of indistinct crystals ; 
from a not too concentrated hot solution it separates as distinct trans- 
parent needles on slow cooling- When dry, it is tasteless, has a fatty feel, 
and is scarcely wetted by water, more easily by alcohol. It gives a 
: distinct acid reaction when laid on moist litmus-paper. By combustion 
| with oxyd of copper the following results were obtained on distinct 
Preparations, which agree with the formula C1oH110, HO, Ci2HeOss. 
a Calculated. Found. 
| icp aes , 2. 
: Caz («182s 47-14 46°99 es 
on Pe. a 4593 46-03 
280 100-00 30000 100-00. 
‘ * Fei the “ Jour. fiir Prakt. Chem. :” ebbitinandented to this Journal by the author. 
gal dah 3825 gm, gave ‘573 gm. COs and ‘212 gm. HO.—2d, 2623 gm. gave -4491 
$M. 00g and -1723 gm, HO. 7 
