The elements of medical chemistry : embracing only those branches of chemical science which are calculated to illustrate or explain the different objects of medicine, and to furnish a chemical grammar to the author's Pharmacologia . sub-stance by floating draws the scalebeam into a horizontal position ;after which weights must be placedin the opposite scale until the sub-stance is sunk, or drawn under thewater. Suppose, for instance, thebody be a piece of Cork weighing30 grains in air, then it will befound that about 150 grains mustbe placed in the~opposite scale to sink it, and this weight mu
The elements of medical chemistry : embracing only those branches of chemical science which are calculated to illustrate or explain the different objects of medicine, and to furnish a chemical grammar to the author's Pharmacologia . sub-stance by floating draws the scalebeam into a horizontal position ;after which weights must be placedin the opposite scale until the sub-stance is sunk, or drawn under thewater. Suppose, for instance, thebody be a piece of Cork weighing30 grains in air, then it will befound that about 150 grains mustbe placed in the~opposite scale to sink it, and this weight mustbe added to the original weight of 30 grains, making 180grains for the weight of a bulk of water equal to that of thecork. The original weight (30 grs.) must now be divided bythat of the water, viz. 180, which of course can only be donefractionally, the result of which will show that the specificgravity is negative, or less than the standard ; it consequentlycannot be expressed by an integer, but will come among thefractions, being only 0-24. 71. In conducting this investigation we may convenientlyregister the results in the manner already recommended (56)taking care to add, instead of subtracting, the second charge ;thus,. 180
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