j bie PHYSIOLOGY OF THE BACTERIA. 
Other gases studied by the same savants have 
given the following results : — 
Hydrogen at first causes an acceleration of 
movement, which is maintained for several days; 
then movement becomes less active, and finally it 
ceases altogether. 
Carbonic Acid.— Contrary to the facts stated 
by Pasteur, this agent was found to paralyze the 
bacteria, and reduced them to complete immobility. 
If the carbonic acid is displaced by oxygen, the 
bacteria resume their activity. 
Chloroform. — This substance, according to the 
researches of Miintz, arrests the vital phenomena 
of organized ferments. Miintz uses this charac- 
ter in order to recognize the soluble ferments, upon 
which it has no action. 
Boracic Acid.—Since the labors of Dumas, 
which have demonstrated that boracic acid kills 
the inferior organisms by depriving them of their 
oxygen, this substance has been employed in vari- 
ous circumstances as an antiseptic. 
Sulphate of Quinine.— The action of quinine, 
either in the state of chlorhydrate or of sulphate, 
is not yet well established. The experiments of 
Binz, Manassein, Kroevitsch, Bochefontaine, etc., 
have, in truth, given contradictory results. 
Carbolic Acid. —The experiments of Manas- 
sein have demonstrated that 5;th per cent of car- 
