7 
404 Scientific Intelligence. 
1:7°2, besides SH,, Hand N, at the beginning, and in the ratio 
1:3°4 at the end. The remaining liquid, which had an acid reac- 
tion, was fractionated and yielded acetic aldehyde, acetic acid 
and other volatile fatty acids. The other cellulose fermentation, 
water, containing in 100 parts HK,PO, 0-2 gram, MgSO, 0°04, 
CaCl, 0°02, called Niageli’s solution; (3) or by aqueous solutions. 
which contain, besides the above mentioned salts, nitrogenou 
bodies, such as 0°35 ammonium acetate, 0°3 acetamide or 0°6 
asparagin in 100 parts. With the second of the above named 
solutions, the gas evolved consists of 55°39 CO, with a small 
hea dade of SH, and of 42-71 H, the difference 1°90 being mitro- 
gen. control-flask treated in precisely the same way, but con- 
taining no cellulose, evolved no gas. On examining the residue 
in the flask, the same bodies were detected as in the first fermen- 
tation. Hay, enclosed in a flask with air and water, evolves gases 
consisting of hydrogen and carbon dioxide and produces volatile 
acids. The author applies the facts he has observed to the phe 
nomena of marsh gas formation from cellulose in ponds at 
marshes,-— Ber. Berl. Chem. Ges., xv, 1734, July, 1883. 
