NOt va 
American Journal of Science. 1] 
New and most important work for all those con- 
cerned in Iron Works. 
J. DOBSON, 
No. 106 Cuestnur Street, Paiwapevputa, 
Proposes to publish by subscription, the following most important 
work. 
A COMPLETE THEORETICAL AND PRACTICAL TREATISE 
ON THE 
MANUFACTURE OF IRON. 
Comprising a full account of its different ores, their analyses, 
&c., the various processes and ample descriptions of the Furnaces, 
Forges, Rolling Mills, &c. &c., with nearly 70 very large plates, 
which are all drawn to a scale, and may be considered as working 
drawings—to include a translation of the whole of the great work 
So 
on Iron of Messrs. Le Branc and Watrter, and contain all its nu- 
merous plates, with additions from other sources, and numerous 
analyses of the Coal and Iron Ores of this country and Europe, to- 
gether with the Statistics of the Coal and Iron of the United States, 
and abstracts of the most important Patents relating to Iron, with 
critical remarks—also an Essay on the Smelting of Iron with An- 
thracite Coal, as now practiced in Pennsylvania—by S. W. Ros- 
ErTs, Esq., Civil Engineer—to be published under the superinten- 
dence of J. C. Boorn, Esq., Professor of Chemistry applied to the 
Arts, at the Franklin Institute. 
It is scarcely necessary to speak of the value of a work such as 
this, which must be of the greatest interest to the Practical Iron 
Master, as well as to every one concerned, either directly or indi- 
rectly, in this most important subject. The great French work of 
Le Branc and Watrer, being confessedly the most complete that 
has yet appeared, it will be reproduced in this, with additions—the 
Plates are all drawn to a scale, which will enable any one to con- 
struct, by their means, whatever may be required. The Essay on 
the Smelting of Iron with Anthracite Coal, by Mr. Roserrs, will 
be found very interesting; it is the production of a gentleman of 
talents, and of sound judgment and unwearied research, who, highly 
favored by his position, has given the subject much attention. The 
numerous Analyses of the Coal and Iron Ores, both of our own 
country and Europe, will afford much interesting and useful infor- 
ieee 
mation; while the statistical portion will be drawn from the most, 
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