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 . hich istermed by the Excise board Proof Spirit; its specific gravitybeing about 0-933. The relation which all other spirituousliquors have to this standard is expressed by saying that theyare so much above, or under. Hydrometer proof; thus, when itis stated that a spirit is 20 above proof it means that its strengthis such, that one hundred gallons of it will admit
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 . hich istermed by the Excise board Proof Spirit; its specific gravitybeing about 0-933. The relation which all other spirituousliquors have to this standard is expressed by saying that theyare so much above, or under. Hydrometer proof; thus, when itis stated that a spirit is 20 above proof it means that its strengthis such, that one hundred gallons of it will admit an additionof twenty gallons of water, to reduce it to the strength ofproof; and it is considered to be 20 per cent, under proof,when the same quantity contains 20 gallons of water morethan is contained in Proof Spirit. 80. The ordinary form of the Hydrometer is shown in theannexed figure. * The immersed portion oj a floating body Is to the whole body Jlsthe Specific Gravity of the Body Is to the Specific Gravity of the it follows, as a corollary, that, if tbe same body float upon twodifferent fluids, the parts immersed will be inversely as the specific gravi-ties of such fluids. • PARIS S MEDICAL CHEMISTRV. 71. p is a hollow ball of copper, of the shape andabout the size of a hens egg; i is a graduatedscale of thin brass placed upon the top of theball, and k a brass weight attached by a wire tothe lower side of the ball, for the purpose ofkeeping the instrument in an upright position,while it is floating, and is so adjusted as to causethe top of the ball to stand but a very little dis-tance above the surface of distilled water, whenplaced in the same ; m is a weight (of whichthere are several distinguished by different num-bers) that drops on to a pin projecting above thetop of the scale to complete the adjustment of the, instrument; by which it is so much further de-pressed that the Zero point, or bottom of thescale, just coincides with the surface of the water;
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Keywords: ., bookcentury1800, booksubjectchemistrypharmaceutica, bookyear1825
