G. Child on the production of Organisms in closed vessels. 383 
during the whole time ata vivid red heat. When the bulb is 
quite cool, the necks are sealed by means of alamp. The ad- 
vantage gained by means of this apparatus is that there is only 
vious year. 
Some pea‘meal infused in water was boiled in a stream of 
heated air, allowed to cool, and then sealed and put b as 
rh prevented from resuming my experiments for several 
weeks, 
enter, further than to say that seven experiments were tried 
with various infusions. Five of them were afterwards exam- 
ined, and in no case were any organisms found, thus confirming 
VIL. July 18.—Hay infused in water three hours, then filtered and 
boiled 12 minutes in a stream of heated air, and sealed up as 
above described. 
other cases, and sealed up. i 
XIV. July 28,—A similar experiment: boiled 7 minutes, 
XV. July 29.—A similar infusion of celery, allowed to stand 12} hours, 
_ and treated as the last: boiled 12 minutes. 
The bulb used in this last experiment was of a different form, 
which I have found much more convenient, and have always 
