New and most important work for all those con- 
cerned in Iron Works. 
J. DOBSON, 
No. 106 Cuestnutr Srreer, PHILADELPHIA, 
Proposes to publish by subscription, the following most important 
work, 
A COMPLETE THEORETICAL AND PRACTICAL TREATISE 
ON THE 
MANUFACTURE OF IRON. 
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. be great French work of 
E Branc and Water, 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. Roserts, 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 
