On the influence of colloids upon crystalline form and cohesion : with observations on the structure and mode of formation of urinary and other calculi / by William Miller Ord.

Date:
1879
Catalogue details

Licence: Public Domain Mark

Credit: On the influence of colloids upon crystalline form and cohesion : with observations on the structure and mode of formation of urinary and other calculi / by William Miller Ord. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    elusions from his own observations, and wlio felt him- self strong enough to accept them and to stand by them. Hitherto Mr. Eainey's work, though received with respect, has not exercised a wide influence on physiology, either as regards the interpretation of phenomena, or as affects microscopical technics. And at the present moment, when, to quote an example, the question of the structure of blood - corpuscles is attempted to be solved by the use of all kinds of destructive and coagulating agents, it might be well for observers thus employed to read and re-read Mr. Eainey's little book, and to think well over Mr. Savory's observations on the structure of the fresh blood-corpuscles of the frog ( Proc. Eoy. Soc. vol. xvii. 1869, page 346), observations which are conceived in a spirit akin to that of Mr. Eainey's treatise. I propose now to describe pretty fully the syn- thetic process adopted by Mr. Eainey. It consists, to use his own words, in introducing into a two- ounce phial, about three inches in height, with a mouth about one inch and a quarter in width, half an ounce by measure of a solution of gum-arabic saturated with carbonate of potash (the sub-carbonate of the old pharmacopoeias). The specific gravity of the com- pound solution should be 1'4068, when one ounce wUl weigh 672 grains. This solution should be perfectly clear ; all the carbonate of lime which had been formed by the decomposition of the malate of lime contained in the gum, and also all the triple phosphate set free by the alkali, must have been allowed completely to subside. Next, tAvo clean microscopic slides of glass.