Scwttijic News, Accounts of Books, ?2'c, aj 



Principles of modern Chemi/irj, f^ematically arranged, by D^. Frederic Charles Gren, late 

 ProfeJJor at Halle^ in Saxony. Tranjlatedfrom the German^ with Notes and Additions con- 

 cerning late Difcoveries, by the Tranjlator^ and fame necejfary Tables, lllujlrated by Seven 

 Plates. In two Volumes, Odiavo, 964 Pages. Price 16s. Cadell and Davies. 



The charafter of the late Dr. Gren as a chemical philofopher is well known, as is like- 

 wife the value of the work from which the prefent tranflation is made. I fhall, therefore 

 only give a fhort account of the plan : After a concife hiftorical introduftion, the author 

 enters upon his fubjecSl:, which he divides into twelve chapters, each of which is again fub- 

 divided into heads or titles, and thofe into numerous paragraphs or fe£tions. The firft 

 treats of preliminnry or general objedts, and the operations and inftruments of chemiftry. 

 2. The fimple fubftances and procefs of combuftion. 3. Salts in general. 4. Earths. 

 5. Mineral Acids. 6. Conftituent parts of vegetables. 7. Of animal fubftances. 8. 

 Spontaneous changes in the mixture of organic bodies, fermentation, &c. 9. Bituinens. 

 1 o. Mineral coal. 1 1 . Metals. To thefe the tranflator, befides niany ufeful notes and 

 additions through the work, has added an appendix, containing the dodtrine and tables of 

 chemical attraction, the chemical charadlers of Haffenfratz and Adet, fpecific gravities, 

 cqmparifon of thermometers, of weights and meafures, together with an index to the 

 wjiole. 



Tie Chemical Pocket Book, or Memoranda Chemica, arranged in a Compendium of Chemiftry,, 

 according to the latejl Difcoveries y •with Bergman'' s Table of Jtngle eleElive JttraBions, as im- 

 proved by Dr. G. Pearfon. Calculated as well as for the occaftonal Reference of the profejfwnal 

 Student as to fupply others with a general Knowledge of Chemiftry. By James Parkinfon, 

 Small Twelves, 229 Pages. Price 5s. Symonds. 



This is a very good compendium. By ufmg the fmall type, called burgeois, the author 

 has contrived to give nearly the fame quantity of matter in the pages of his little pocket 

 volume as is ufually contained in an o£tavo page. The greater merit, however, confifts 

 in the induftry he has exerted in colle£l:ing the numerous particulars of modern chemiftry 

 from the moft authentic fources, and condenfing them with a degree of neatnefs and 

 perfpicuity which will render his book equally ufeful as a manual of fcience to the phi- 

 lofopher and the ftudent. He quotes his authorities much more frequently than is the 

 modern cuftom ; but it will greatly add to the value of his book if in a future edition 

 he fliould refer in all places by the real title and page to every author of eminence to 

 whom he might wilh to refer his reader. 



Royal 



