Manual of human physiology / by Leonard Hill.

  • Leonard Erskine Hill
Date:
1899
Catalogue details

Licence: Public Domain Mark

Credit: Manual of human physiology / by Leonard Hill. Source: Wellcome Collection.

    23/504 page 7
    I - /Ol o Mix a number of tumblers of sugar and water, place one, two, three, or four, &c. lumps of sugar and the same quantity of water respectively in each. Take small shreds of raw steak and drop a fragment into each glass. With a hydro- meter, determine the density of the solution in which the fragment neither sinks nor floats, but is suspended. You have thus determined the density of flesh or muscle. Repeat the experiment with fragments of bone. Bone is denser than muscle. Tie a string round your finger to congest it, and prick it with a clean needle just behind the nail. A drop of blood will exude. With the head of the needle lift up successive droplets of blood and place one in each glass and so determine the fluid in which the blood neither sinks nor floats. You can thus ascertain by how much your blood is heavier than water. If the density of water be called looo on the scale, then that of urine is about 1020, blood 1060, milk 1030. Fig. 4. Hydrometer for determininjT the density of fluids.
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