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Excerpt from Principles of General Pharmacy
Among the operations performed in dispensing medicines, none is of more frequent occurence than that of weighing and measuring.
The instruments used are the balance or scale and the measure or graduate.
The balance consists of a lever or beam supported at its center of gravity in such manner as to give it the greatest practicable freedom of motion.
The lever is generally supported on knife edges, and according to the sharpness of these, and the hardness of the planes on which these rest, depends the delicacy of indication.
The weight of a body is the measure of its gravitating force, and this is in direct proportion to the quantity of matter it contains.
We have various kinds of force in nature, the most prominent being the force of gravitation. It is in virtue of this force that a body falls to the ground, and it is in virtue of this same force that our earth moves around the sun. Thus weight is a term applied to the measure of a force known as gravity; therefore the latter is the cause, while the former is the effect produced.
This force weight is expressed with relation to some known and recognized 'standard of resistance, which is just sufficient to keep the lever or beam horizontal.
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Principles of General Pharmacy (Classic Reprint)
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Paperback. Zustand: New. Print on Demand. This book provides a comprehensive introduction to the essential principles of pharmaceutical practice. It covers a broad range of topics, including weights and measures, specific gravity, and the preparation of various medicinal compounds. The author provides clear and concise explanations of these fundamental concepts, and includes numerous examples to illustrate their application in real-world settings. The book draws upon historical and scientific context to provide a deeper understanding of the subject matter. It delves into the laws of specific gravity, offering practical methods for calculating the weight and volume of liquids. By examining the increase and decrease of specific gravities, the book empowers readers to adjust the densities of liquids with precision. With its in-depth exploration of these principles, this book is an invaluable resource for students, pharmacists, and anyone seeking to expand their knowledge of pharmaceutical science. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Bestandsnummer des Verkäufers 9781332895472_0
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