This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1865 Excerpt: ...fl. drs. viij. 1 fluid drachm fl. drm.=60 minims... min. lx. 1 minim... min.. = 1 minim.... min. j. It will be observed that with the exception of the symbols for the grain weight. and the gallon and pint measures, all the other symbols are altered. The avoirdupois pound is represented by the symbol lb., which is distinguished from that representing the Troy pound (lb) by the absence of the bar passing across the letters. The difference in this case is but slight. and in some instances in written prescriptions it may be scarcely perceptible, but in the other cases it would be obvious. As the old symbols have been used in all prescriptions written before the publication of the British Pharmacopoeia, and as many medical men will probably continue to use them, it has not been thought necessary to make nny extensive change in the symbols used in previous editions of this.work. Where the symbols lb, 3, 3, and 9 are used it will be understood that they refer to the Apothecaries' weight founded upon the Troy pound and ounce, the weights of the British Pharmacopoeia being indicated by the symbols used in that work. In the second and third part of this work, containing abbreviated and unabbreviated prescriptions, the terms used for representing the medicines ordered in such prescriptions, as well as the symbols representing the quantities, are not in many instances those of the British Pharmacopoeia, the object originally contemplated having been to introduce the various terms and symbols which at different times have been employed in extemporaneous prescriptions. In some instances, however, the names of medicines have been altered in accordance with those now recognized by the highest medical authority, the old names having acquired a different meaning, as in the c...