ae AG bay after. Cane canis of ‘its acid 
ee baryum hydroxide until the reaction is> neutral, accesso a 
off with the first extract. Afterwards, the plant” material takes pts 
additional quantity of baryta, until the enzyme passes over into the ; 
a The authors indicate a fairly exact method for judging the 
: Snore solution, but it re lead us too far to Geer upey Ii 
yi Oe 
) ay 5 A ey fe 
Bee Ne chloroleucytes, but at the expense of aS nucleus. Saney cen ve 
degeneration products of the cell or may occur side by side. | ie 
ei course of degeneration show a pronounced ‘general ener na 
disappear from the cells, in which the fats pina 
Physiological and Pusceoacsingiees san ea), 
Some years ago, we feceseeel ae Teudt’s?) theory of the origin of the nom 
of smell. Since then, the author has further developed his theory and Bas 0 
) elsewhere’). He starts from the observation, that with all chemical. compo) rt 
et have an odour, this cannot be modified as long as the molecule: is not ae 3 
but must be in, the molecule. Then, it is true, the atiesige remains still 
whether it is to be looked for in, or outside of, the atoms. Conject 
he comes to the result that the cause of the formation oh iit must | 
atoms in the molecule. 
there. The molecules of odorous Aides do not eete ‘any conta Be O 
emanation of odour, so that he takes it that smells are caused ses movements re 
this case, one must also take it for. granted that there % - similar 
olfactory nerves of the nose. ! . a 
What is new in his present publication’ is a 4 speculation. about th 
he tries to make clear through several rarer A reproduction th 
discussion would lead us to far and we would Fe ted mention % “some > of 
3) CaF: de biologie $1 (1918), 920; Chem. Zentralbl. 1919, Le 059. 
Report Apri 1914, 123: — 4) Prometheus 80 eee ou, 209. oe 3 
