Notices respect ing New Booh. \-l9 



kiiul, as that of medicine, when it is hberally and fairly exercised, 

 uiy hibours will be amply repaid, and my highest anilntion moj.t 

 abiuidantiy gratified." 



We are far from expecting perfection in the early editions of a 

 work comprehending such an immense variety of chemical and 

 pharmaceutical preparations. That there is however a still nearer 

 approximation to this desirable requisite in the third edition of 

 rile Pharmacopoeia now before us, a sliglit perusal will convince 

 every candid reader. Tii his praisewortliy laboiu's Dr. Powell 

 has judiciously availed himself of the assistance of the best prac- 

 tical chemists of the metropolis ; among whom he has occasion 

 more than once to particularize an old and zealous contributor 

 to the Philosophical Magazine, Mr. Hume of Long Acre. The 

 very scientific and delicate process for preparing " A/it'ivion'mm 

 tariarizad/m," as communicated by that gentleman in a pre- 

 ceding number of this Journal, is embodied into the present edi- 

 . tion of the work of the College, with a few modifications. How 

 far these changes may or may not benefit the preparation, we 

 are not from actual experience qualified to decide : of this we 

 are certain, however, that Mr. Hume's jjrocess, as described in 

 this Journal, and above alluded to, hassince been adopted, and with 

 the most complete success, by almost every practitioner in phar- 

 macy in the metropolis. In such a very delicate process, there- 

 fore, and of the result of which practical chemists are alone best 

 qualined to judge, deviations from their formulifi ought to be 

 cautiously introduced. 



Before concluding, we ought to add that the present edition 

 has to boast of a very valuable Appendix, containing every re- 

 quisite table respecting weights and measures, proportion of doses, 

 &e. ; without an intimate and familiar acquaintance with which, 

 no practitioner in medicincor pharmacy can answer for the con- 

 sequences of his prescriptions. 



Mr. Accum has in the press a second edition [stereotype] of 

 his Practical Treatise on Gas Light ; exhibiting a summary de- 

 scription of tlie apparatus and machinery best calculated for il- 

 Uuninating streets, houses, and manufactories, with coal gas ; 

 with remarks on the utility, safety and general nature of this new 

 branch of civil (XHonoiny. Illustrated with seven coloured plates, 

 showing the construction of the large machinery employed for 

 illuminating the streets and houses of this metropolis, as well as 

 the smaller apparatus employed by manufacturers and private in- 

 dividuals. 



A second edition hfis just appeared of the late Mr. Bramah's 



ingenious Disscrtutiori on the Coustruction of Locks; accom- 



K 3 panied 



