of Dadhi is a
streptothrix having characters similar to the _Bacillus bulgaricus_ and
_Streptobacilli lebeni_, and _Bacillus caucasina_ and the Long Bacilli
of Mazun, in (1) not growing in ordinary media; (2) producing a large
amount of lactic acid in milk; (3) producing, besides coagulation of
casein and splitting up the sugar of milk into lactic acid, no other
change in milk; (4) not producing any indol, nor peptone, nor
saponification of fat, nor formation of any gas.

"3. It differs from the above by showing peculiar pink-stained granules,
when stained with methylene blue and showing peculiarly convoluted
chains in glucose agar.

"4. The importance of the organism lies in the fact that, as in the case
of _Bacillus bulgaricus_, it kills all pathogenic non-sporing germs and
also destroys all proteolytic gas-forming bacilli in milk."

In the account of these investigations the following table is given,
showing the amount of lactic acid produced by different lactic acid
bacilli in one litre of milk, in terms of lactic acid--the culture
being kept at 37 deg. C.

+--------------+-------+-------+-------+-------+-------+-------------------+
| Name of the | After | After | After | After | After | |
| Bacillus. | 24 | 48 | 72 | 96 | a | Remarks |
| | Hours.| Hours.| Hours.| Hours.| Week. | |
+--------------+-------+-------+-------+-------+-------+-------------------+
| B. lactis | 1.8 | ... | 10.08 | ... | ... | Observed by |
| aerogenes | | | | | | Hall and Smith |
| | | | | | | |
| B. coli | 1.8 | ... | 4.77 | ... | ... | Observed by |
| communis | | | | | | Hall and Smith |
| | | | | | | |
| B. | 12.8 | 16.5 | 20.2 | ... | 22 | Observed by |
| bulgaricus | -.4 | -.4 | -.4 | ... | -.4 | Gabriel Bertrand |
| | | | | | | and Weisweller; |
| | | | | | | the initial |
| | | | | | | acidity of the |
| | | | | | | milk was 4 |
| | | |