. An introduction to practical pharmacy [microform] : designed as a textbook for the student and as a guide to the physician and pharmaceutist : with many formulas and prescriptions . y counterpoised, remove itto a level table or counter, so high that it willbe on a line with the eye, and carefully, withthe point of a pin, mark the line formed bythe surface of the liquid, and opposite this theappropriate sign; this may be rendered moreclear and distinct afterwards. In the same way mark the variousother denominations, having an eye to the temperature, whichshould not vary far from 60°. Now form
. An introduction to practical pharmacy [microform] : designed as a textbook for the student and as a guide to the physician and pharmaceutist : with many formulas and prescriptions . y counterpoised, remove itto a level table or counter, so high that it willbe on a line with the eye, and carefully, withthe point of a pin, mark the line formed bythe surface of the liquid, and opposite this theappropriate sign; this may be rendered moreclear and distinct afterwards. In the same way mark the variousother denominations, having an eye to the temperature, whichshould not vary far from 60°. Now form a paste, by mixing asufficient quantity of finely powered fluor-spar with sulphuric acid,and spread this over the marked surfaces, and set the measure asidefor a day or two, after which, wash it off and remove the wax; thegraduated measure is now indelibly and distinctly marked, and, ifwe have used the proper care, more accurately than is usual withthose sold. I have compared two, in which the one fluidrachmmark of one corresponded nearly with the two fluidrachm of theother and in other respects they were almost as much at variance. 1 Equal to 1 lb. 4 oz. avoirdupois f Siv grad. measure. 42 WEIGHTS AND MEASURES, AND SPECIFIC GRAVITY. A precaution to be observed, whether in graduating or using ameasure, particularly of small capacity, may be appropriately men- tlOllGQ ilCTG Owing to the adhesion of the liquid to the sides of the measure,its surface is concave, and shows, from a side view,two lines: one where the edge of the liquid adheresto the glass, and the other, the line of the lowersurface of the concavity. Now, in order to fix thetrue line in this case, it must be intermediate betweenthe upper and lower edge of the liquid, and not ateither surface. This is more obvious the smallerthe diameter of the measure, and, in the accom-panying drawing, the dotted line has been made atthe proper point for measurement. Approximate Measurement—The approximate stand-ards of
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectpharmacy, bookyear185
