886 G. Child on the production of Organisms in closed vessels. 
here were almost wholly deprived of light. Thus, before open- 
ing the vessels, I had made up my mind that the results of the 
other half of the series were most to be depended upon. The 
temperature of the room in which they were probably never fell 
below 40° Fahr., and was generally between 50° and 60°. 
The examination of the B division of this series took place 
at Dr. Beale’s house, Feb. 7, 1865. The results were as follows: 
Exp. IV.—Hay ++ water + heated air. A few bacteriums were found in 
active motion 
Exp. I.—Hay + water-+ heated air. Very large numbers of similar 
d 
Exp. VI.—Flour-+ water-++ heated air. Few were found as compared 
with the last, but still several in active motion. 
Exp, XII.—Flour-+ water+- oxygen. No organisms found, 
Exp. VIII.—Flour + water heated air (unfiltered). A good many 
bacteriums, similar to the others. 
Exp. X.—Flour + water + oxygen (unfiltered). Some bacteriums, but 
not moving. 
The other set of experiments was examined by me at Oxford 
on various evenings between Feb. 16 and March 8; but during 
some part of that time I possessed no object-glass of sufficient 
magnifying power to avoid all uncertainty in the results. 
In both of them, viz: Nos. V and XI, I could find nothing 
like bacteriums. In the three others, viz. II], VII and I 
and the absence of granular matter; but upon examining sev- 
eral portions after the vessel had been open for a few minutes, 
though they continued to be seen in equally large numbers, all 
movement had ceased. They were examined with a ; object- 
ass of Messrs. Powell and Lealand. Now, if we omit from 
these two series of experiments those which I have already 
bacteriums were found and seen by both of us in three out of 
oe "i seven, and five out of the remaining six—in all, in 
ight. 
w, it may be asked, why the same or similar organisms 
were not found in the other cases, if the experiments were fairly 
tried? The answer is this, viz. that we do not know all the 
conditions under which they exist. It is pretty clear that they 
