Advertising Sheet, fyc. 



Armstrong'^s Hydro-Electric MacJiines. 

 Messrs. WATSON &. LAMBERT, 



OF 



NEWCASTLE UPON TYNE, 



Who were entrusted by Mr. Armstrong with the manufacture of 

 the Hydro-Electric Machine now exhibiting at the Royal Polytech- 

 nic Institution in London, and who have the advantage of being ac 

 quainted with every improvement which he has since made, beg to 

 announce to the public, that they make these Machines of a port' 

 able size, and heated with Coke, Charcoal, Gas, Spirit or Iron heat 

 ers. The improvements which have recently been made in their 

 construction, have not only materially increased their power, but 

 have rendered them capable of being much more conveniently used 

 in a room, than they have liitherto been, and in point of economy 

 and power, Messrs. Watson h Lambert can confidently recommend 

 them as a substitute for the Glass Machines, over which they possess 

 the additional advantage of being in no degree influenced by the state 

 of the weather. 



Fixed Hydro-Electric Machines of all sizes, and every degree of 

 power, are also manufactured by Messrs. W. & L. 



Carliol Square, Newcastle on Tyne, (England,) 1844. 

 Oy A list of the powers and prices may be obtained on applica 

 tion to Messrs. Wiley &i Putnam, 161 Broadway, New York. 



MULDER'S CHEMISTRY 



OF 



VEGETABLE AND ANIMAL PHYSIOLOGY. 



In course of publication. The Chemistry of Vegetable and 

 Animal Physiology, by Dr. G. T. Muj^der, Professor of Chem 

 istry in the University of Utrecht. Translated from the Dutch, by 

 P. F. H. Fromberg ; with an Introduction and Notes by Prof. 

 J. F. W. Johnston. Authorized American edition, with Additional 

 Notes and Corrections, by B. Silltman, Jr., Assistant and Lecturer 

 in the departments of Chemistry, Geology, and Mineralogy in Yale 

 College. 



This edition of Dr. Mulder's learned and philosophical Trea 

 tise will form 2 vols, large 12mo, of about 500 pages each, and will 

 be published nearly contemporaneous with the issue of the English 

 translation under the charge of Prof Johnston, Part I is just pub- 

 lished by WILEY h PUTNAM, 



161 Broadway, New York. 



'. January, 1845. 



