Chemical Works. 80 



investigator, we may expect repeated editions of a work which, from 

 its deserved popularity in Britain and in this country, must continue to 

 he in regular demand and cannot be supplanted by any cotemporary 

 performance. It interferes not with the works of the other British 

 chemists : those of Dr. Thomson, Dr. Henry, Dr. Ure, Dr. Murray 

 and Prof. Brande, being sufficiently different in design not to come 

 in competition with Dr. Turner,* or, materially, with each other. 



3. Prof. J. W. Webster's Manual, on the basis of Brande. — ■ 

 For a notice of this work, we refer to Vol. XI, p. 377, of this Jour- 

 nal. Since that, it has passed through a second edition, and its adop- 

 tion in several American colleges and other seminaries, evinces that 

 its merits, as a judicious and faithful compendium of the science, are 

 justly appreciated. 



4. Prof. Green's Elements, on the basis of Turner. — Upon this 

 basis. Professor Green has ingrafted various additions and improve- 

 ments, resulting especially from his personal observations abroad, and 

 more particularly while in Paris, under the auspices of some of the 

 most eminent men of that city. 



5. Dr. Henry's Elements, 11th edldon. — It was our intention 

 to notice this latest and much improved edition, more than a year 

 since, when a copy was received from the respected author ; but 

 cares and labors have intervened, and prevented the fulfilment of 

 many purposes, as well as of this. The following notice from Dr. 

 Brewster's Journal for July 1830, (Edinburgh,) is so much in unison 

 with our own views., and we were so much gratified by the extract 

 which it contains, that we with pleasure insert it entire. 



" From this new edition of Dr. Henry's system of chemistry, we 

 extract the following recommendation, which is addressed to the no- 

 tice of learned Societies. 'The great laws of combination in defi- 

 nite and in multiple proportions, on which the Atomic Theory 

 mainly rests, have, more especially, derived increased support from 

 the accumulated mass of evidence. In too many instances, it must 

 be acknowledged, we have not, even yet, attained all the precision 

 that is desirable, as to the true proportions in which bodies combine. 

 Nor can we arrive at this degree of certainty, until the relative weights 



* Mr. Grigg's editions are in a neat and convenient form, and perhaps the great 

 demand for the work in this country, will enable the respectable publisher to give 

 his future editions in a stj'le more attractive to the eye, 



Vol. XX.— No. I. 12 ' 



