Derivatives of Nitrotartaric Acid. 415 
kind in sulphate of strontian, and M. G. Rose, in tetradymite; accord- 
ing to the latter, foreign matters cause the’ ging ee of tetrady- 
mite to vary nearly 3 degrees from that of the pure meta 
In view of such facts, my opinion appears less exequedand than at 
first. ‘The two forms of dimorphous bodies are in general approximate 
forms, whose prisms, although pertaining to distinct systems, differ be- 
presides in crystallization, so as to give ne waving what is needed 
to cause them to pass from one system to a 
Should a new planet suddenly appear in our panes all the other plan- 
ets would feel it as much as if a planet were withdrawn. A crystal is in 
my view a planetary system formed of atomic planets 1 in motion; for- 
eign molecules or planets abruptly introduced, bring in their own attrac- 
tion and proper movements, and impress on the other atoms another 
t the coloring material that was eliminated entirely . some 
¢rystallizations in pure water. on the co e substance is 
tive em ; for change either totally or partially. 
have illustrated fen glycocoll and its combinations, oxalate and chlor- 
hydrate of methylammine, e 
lt is not my intention at this time to touch on these nessa They 
have been called up by the reading of an important paper by M. Senar- 
with wrod, changed to ore by some ea of ammonia. 
leisure hours to science, has brought out several new facts of interest. 
He has observed that the nitrotartaric acid which he has obtained, de- 
composes ms tpn in water, producing an acid which he cats tar- 
tronic acid, CeHsO10. Heated to 160° C., it loses carbonic acid and 
leaves a residue which appears to Single to CaH2Os ; this in con- 
tact with potassa affords a salt, the acid of which has the cee 
CsH40Oc and is ves with slycollic acid, extracted from t r 
of gelatine. This a orms an amid which is not the sugar of dela 
tine although like ii in rent pies Glycollamid is an isomere of gly- 
Cocoll, just as lactamid is an isomere of alanine. . Dessaignes con- 
Siders the insoluble substance CaH2Os as having the same relation to 
glycollic acid as lactid to lactic acid ; and he hence calls it glycollid. 
On the gluten of wheat.—M. Millon, compelled by his high military 
Position to rather a nomadic life, has for some years suspended the fine 
Tesearches which he had undertaken—researches on the oxydized com- 
3 of nitrogen, chlorine, mercury, nitric ether, also on vegetable 
Physiology, etc., which had given him a high rank among men of sci- 
ence. Removed from his laboratory and sent to Africa, for political 
