6 Advertising Sheet of the | 
New and most important work for all those con- 
cerned in Iron Works. 
J. DOBSON, 
No. 106 Cuestnur Srreet, Puiwapevruia, 
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 
rawings—to include a translation of the whole of the great work 
on Iron of Messrs. Le Buanc and Watrer, 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. Booru, 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- 
