File:Dr. Hood's plain talks about the human system - the habits of men and women - the causes and prevention of disease - our sexual relations and social natures - embracing common sense medical adviser... (14775953762).jpg

Identifier: drhoodsplaintalk00hood (find matches)
Title: Dr. Hood's plain talks about the human system : the habits of men and women - the causes and prevention of disease - our sexual relations and social natures - embracing common sense medical adviser...
Year: 1902 (1900s)
Authors: Hood, G. Durant
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Publisher: Chicago : Hood Medical Book Co.

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fresh has a faint whey-like fragrance,and when fermenting it smells like sour milk.Certain medicinal substances, when administeredinternally, produce peculiar alterations in the colourof the urine. Thus, when rhubarb is taken itcolours the urine a deep gamboge-yellow, which onthe addition of a little hartshorn is at once changedto red. Senna communicates a brownish, and log-wood a reddish tint to the urine, and santonineimparts a conspicuous orange-red colour if it bealkaline, and a rich golden-yellow if it be acid.Creosote, and the external application of tar oint-ment, produce a very dark, almost black urine, andthe same effect is noticed when carbolic add isused as a dressing in surgical operations. In many cases it is very important to learn th«density or specific gravity of the urine. This fact is ascertained by means of alittle instrument called the urinometer (Fig. 16). If you take a tumblerful ofordinary drinking-water, and immerse the urinometer in it with the bulb (b) down
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Fig. 16.— URnyOMETE*. HOW TO EXAMINE THE URINE. 603 wards, you will find that it will sink to the point marked 0, and this is called1,000. Now if you substitute for water the urine of a healthy person you will findthat the urinometer will not sink so far, and will probably float at some pointbetween 15 and 25. This shows that urine, like blood, is denser or thicker thanwater. Supposing the urinometer had come to rest at the point marked 20, weshould say that the specific gravity of that urine was 1,020, the specific gravity ofwater being 1,000. In taking the specific gravity of the urine or any other fluidyou must take care that the instrument floats quite freely, and does not touch thesides or bottom of the vessel anywhere. You should also see that bubbles havenot collected round the stem of the urinometer, for they are apt to buoy it up,and make the urine appear denser than it really is. You should nevertake the specific gravity of a urine directly it has been passed, but wait til

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