12 D. Appleton <&> Co?s Medical Publications. 



HOFFMANN. 

 Manual of Chemical Analysis, as applied 



to the Examination of Medicinal Chemicals and their 

 Preparations. A. Guide for the Determination of 

 their Identity and Quality, and for the Detection of Im- 

 purities and Adulterations. For the use of Pharma- 

 ceutists, Physicians, Druggists, and Manufacturing 

 Chemists, and Pharmaceutical and Medical Students. 



BY FRED. HOFFMANN, PHIL. D. 



One vol., 8vo. Kichly illustrated. Cloth. Price, $3. 



The preparation of the chemicals used in medicine and pharmacy has largely 

 passed from the hands of the pharmaceutist into those of the manufacturer ; 

 yet legal responsibility and professional duty require all who compound, dis- 

 pense, or sell medicines, as well as the manufacturer, to determine, by correct 

 tests y the identity, quality, and purity of every article dispensed or sold for med- 

 ication. A work embracing the most approved methods of examinations, and 

 forming a critical and useful guide for such tests, has as yet been a desideratum. 



This want has now been successfully met by the present work. 



The book is divided into two parts, the first of which treats of operations 

 and reagents, and gives a general account of the principles and methods of 

 chemical analysis. The second, or main part, gives, in an alphabetical order, 

 a complete account of the medicinal chemicals, their physical and chemical 

 characteristics, and directions for the establishment of their quality and purity, 

 selected and arranged with care and judgment ; each compound is fully de- 

 scribed according to its aspect and properties, its solubility in the usual sol- 

 vents, simple and chemical, and its deportment with reagents (tests of Identity] 

 this is followed by the Examination, under which heading the defects, or the 

 accidental impurities, resulting from the processes employed in the manufacture 

 of the chemicals, or from insufficient purification, and also the adulterations and 

 substitutions, are considered, and their detection clearly and precisely described, 

 so that they are readily understood by those having an average knowledge of 

 chemistry, and ordinary chemical manipulations, many of which, as well as the 

 more important apparatus, are illustrated by excellent engravings. A number 

 of very useful tables is scattered through the text ; and the volume concludes 

 with comparative tables of the thermometric scales, the troy and metric weights, 

 and a complete index, embracing the common English terms and the Latin 

 names and synonymes in use. 



The work has been brought up to the latest results of scientific research, 

 within the briefest possible compass ; and forms a thoroughly practical and 

 trustworthy guide, combining easy operations, simple apparatus, and economy 

 of time, with the greatest attainable accuracy. 



