... differentiated, and that is, that practically all of them are capable of producing their characteristic chemical transformations under anaesthetic conditions, as in a saturated ether or chloroform atmosphere. ... The cream always contains per cc. a great many more than the skim-milk, the reason for this being that the bacteria are caught and held in the masses of fat globules, which, on account of their ... acid content, and it was shown that the milk with the least acid was, as a rule, the freest from spore-bearing bacteria. This acid determination can be made at the weigh-can by employing the...