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 . written forCeach other; a stroke of the pen too muchmay kill the patient, and a stroke too littlemay produce a medicine of no efficacy. To obviate thisobjection, it has been recommended to employ the contractedwords Unc, dr., scr. : but let me ask whether such contrac-tions are not equally liable to perversion in the hands of thecareless prescriber ? In support of
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 . written forCeach other; a stroke of the pen too muchmay kill the patient, and a stroke too littlemay produce a medicine of no efficacy. To obviate thisobjection, it has been recommended to employ the contractedwords Unc, dr., scr. : but let me ask whether such contrac-tions are not equally liable to perversion in the hands of thecareless prescriber ? In support of this belief it is only neces-sary to state, that in the very work in which this fastidiousobjection is urged, drs. are more than once printed by mistakeinstead of grs. 41. In chemical experiments, it will be fouW very conve-nient to admit no more than one description of weight. Thegrain is of such magnitude as to deserve the preference. Ithas been a mathematical problem to ascertain the least num-ber of such weights which may he necessary for chemicalpurposes ; but Dr.* Ure very justly observes that the opera-tor ought rather to seek the most convenient number for as-certaining his inquiries with accuracy and expedition. The. .)i PARISS MEDICAL CHEMISTRY. error Of adjustment is the least possible, when only one-weightis in the scale ; that is, a single weight of five grains is twiceas likely to be true, as two weights, one of three, and theother of two grains, put into the dish to supply the place of thesingle five ; because each of these last has its own probabilityof error in adjustment. The most convenient set of weightsfor the laboratorv is one that corresponds-with our numericalsystem, thus 1000 grains, 900 grains, 800 grains, 700 grains,&c. down to T5^ of a grain. With these the ehemist will al-ways have the same number of weights in his scales as thereare figures in the number expressing the weights in grains :thus 742-5 grains will be weighed by the weights 700, 40, 2,a
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Keywords: ., bookcentury1800, booksubjectchemistrypharmaceutica, bookyear1825
