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If we can't get good milk we can do without it, for it is not a necessary food, but we can get good milk if we make the effort. If the milk is filthy, boiling or pasteurizing does not remove the dirt. But even in this case pasteurization does not destroy all germs, particularly those of tuberculosis, peptonizing bacteria of cowdung, and the dust of houses and streets, etc."
The method usually adopted for estimating the peptonizing power of pepsina porci consists in dissolving 1 to 2 grains in 8 to 12 ounces of water, to which 40 to 60 minims of hydrochloric acid has been added. 500 to 1,000 grains of hard-boiled white of egg, granulated by rubbing through a wire sieve, is immersed in the liquid, and the whole kept at 98° to 130° F. for four hours, when the undissolved albumen is filtered off through muslin, and, after partial drying, is weighed to ascertain the amount dissolved.
She had always maintained in theory, and now at this crisis with characteristic firmness of purpose acted upon her theory, that absolutely unforced confidence was the only kind worth having, and that moreover, unless some help was necessary, it might be as well for the younger generation early to acquire the strengthening capacity to keep its own intimate experiences to the privacy of its own soul, and learn to digest them and feed upon them without the dubiously peptonizing aid of blundering adult counsel.
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