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"An Expert-Conducted Tour for Medical Men Through the Wonderland of Colloid Chemistry" would probably be an appropriate title for this work, if the other instalments live up to the promise of this one. Not that this is mental pabulum for the uninitiated. It is, on the other hand, not written as exclusively for the expert as so many other books on "colloids" are, which contain such a morass of mathematics that any non-expert gets mired in it. Liesegang's introduction alone is worth the "price of admission." Protoplasm is pictured as a feltwork of fine fiber-shaped colloid particles intermingled with an emulsion, kept by antagonistic influences (K vs. Ca, lecithin vs. cholesterol, and so on) at a critical point, at which change to water-in-oil or oil-in-water emulsion readily occurs. Changes in either direction, as by excess of K over Ca, or vice versa, even when exerted only at the surface of
Medizinische Kolloidlehre. JAMA. 1933;100(23):1888. doi:10.1001/jama.1933.02740230066036
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