190 * Bibliography. 



of the "second supplement/' containing about 160 pages. The delay in 

 its appearance, has resulted from a desire on the part of the editors to 

 include in it all the recent discoveries of the science, and especially the 

 new views of Dr. Liebig, contained in his Animal Chemistry, published 

 last June. Those who purchased the first part of the sixth edition of 

 this work, and have waited till now for its completion, will have the plea- 

 sure of repurchasing the whole, if they mean to be possessed of the entire 

 seventh edition. 



f 



The chapters on salts have been remodelled in this edition, and the pres- 

 ent views respecting salt radicals explained ; while the entire organic 

 chemistry has been rewritten, and many laborious series of researches 

 undertaken at Giessen in reference to this end. A condensed summary 

 is given of Prof. Liebig's views of the changes which occur during the 

 life, growth, and nutrition of vegetables and animals ; and a few pages 

 added (as part fourth) on chemical analysis, taken chiefly from the recent 

 work on that subject by Mr. Parnell. 



5. Elements of Chemical Analysis, Inorganic and Organic ; by Ed- 

 ward Andrew Parnell, Chemical Assistant in University College, 

 London. London, Taylor & Walton, 1842. pp. 309, 8vo. — An origi- 

 nal work on this subject in English and written in England, is indeed 

 a rarity which cannot be allowed to pass unnoticed. It is not to be ex- 

 pected that in a work of 300 pages there should be any thing like the 

 fullness of Rose's elaborate manual in two volumes. But this work was 

 evidently written for the uninitiated in the analytic art, and in that view 

 it is an excellent book. Indeed Mr. Parnell's book supplies a deficiency 

 which has heretofore existed in the chemist's library, of a work intended ft* 

 the non-proficient. The knowledge assumed to be familiar to the reader in 

 the admirable treatise of Heinrich Rose is quite beyond the acquirements 

 of most students, and hence his long, full descriptions of unknown pro- 

 cesses serve to only darken counsel by words without knowledge. 



A pretty full and well arranged set of tables, evincing much labor and 

 care, follows the introduction, and contains in a convenient form for refer- 

 ence the most usual and important behavior of the various oxides and 

 acids with reagents. 



The various manipulations and necessary apparatus on which the suc- 

 cess of analytical operations depends, are the subject of the first part of 

 the book. Numerous and well drawn wood-cuts illustrate the text when- 

 ever such illustration is important. The quantitative analysis of various 

 bodies is ably discussed, and the difficult analysis of natural silicates illus- 

 trated by well selected examples. This part of the work contains tables 

 of great value and convenience to the student. The use of the blowpipe, 

 and the treatment of substances in the inner and outer flame, is fully 

 treated, which, with a description of the modes of detecting poisonous sub- 

 stances, (arsenic, lead, mercury, &c.) finishes the first part of the work. 



