LEA & BLANCHARD, 



PHILADELPHIA, 



HAVE RECENTLY PUBLISHED 

 A NEW SERIES OF 



THE 



AMERICAN 



JOURNAL OF THE MEDICAL SCIENCES, 



EDITED BY 



ISAAC HAYS, M. D. 



COMMENCED ON THE JST OF JANUARY, 1841. 



TERMS. 



Each number contains 260 pages, or upwards, and is frequently illustrated by coloured 

 engravings. It is published on the first of January, April, July, and October. Price Five 

 Dollars per annum, payable in advance. 



Orders, enclosing the amount of one year's subscription, addressed to the publishers, or 

 any of the agents, will receive prompt attention. The year of this work commences with the 

 January number. 



Persons sending Twenty Dollars will be entitled to five copies of the work, to be forwarded 

 as they may direct. All persons desirous of advancing the interest of medical science, are 

 requested to use their efforts to increase its circulation. 



The postage per number is, within 100 miles, about 16 cents; over 100 miles, about 28 

 cents. 



A few complete sets of the old series may be had at a large discount from the subscription 

 price. Odd numbers can be furnished to complete sets. 



PRACT ICAL 



GEOLOGY AND MINERALOGY, 



WITH INSTRUCTIONS FOR 



THE QUALITATIVE 



ANALYSIS OF MINERALS. 



BY JOSHUA TRIMMER, F.G.S. 



WITH 212 WOOD CUTS. 



A handsome Octavo Volume bound in Embossed cloth. 



This is a systematic introduction to Mineralogy and Geology, and admirably calculated to 

 instruct the student in those sciences. The organic remains of the various formations are 

 well illustrated by numerous figures which are drawn with great accuracy. 



