No. 200.J 
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cases, may be all that is necessary to prepare them for reduction. If 
this view of the subject is correct, a saving, in fuel, may be made, by 
raising the ore a year in advance of the time it is required for smelting, 
and exposing it, during that time in small heaps. During this period, 
the decomposition will go on, and the remainder of the sulphuret in the 
ore, will pass into the state of an oxide, in part, and the soluble parts 
containing sulphur, will be carried off in the rains to which they will be 
exposed. Besides this, the change in the state of aggregation of the 
masses, will be highly favorable to the reduction, by bringing them into 
an open and porous state. 
It is believed that the exposure of all the ores of iron, in this manner, 
will produce changes in them, which will facilitate, more or less, their 
reduction, and, at the same time, improve the quality of the iron. I 
learn from the Hon. George Parish, the proprietor of the iron works at 
Rossie, that sufficient bog ore has been discovered in that neighborhood 
to improve greatly the quality of the manufactures of his furnace. The 
ore this gentleman employs is the specular ore, the earthy variety 
known in the vicinity under the name of the Caledonia ore. Two hun- 
dred tons of pig iron, manufactured from these ores, a mixture of the bog 
and specular, has been declared the best sent to the Boston market. The 
castings, also, at this furnace, are in the highest repute, as they possess 
the properties of smoothness or evenness of surface, and also endure a 
great heat without suffering an injury. 
The daily average product at the furnace, in a six month's blast, was 
two tons. One ton of ore, yielding 1,130 lbs., but including the shot 
iron, is estimated as yielding 1,580 lbs. 
It is probable that the state of the iron manufacture in St. Lawrence 
county, remains much as it was at the time of the publication of the 
report for last year. 
The discovery of deposits of iron, during the last year, have been 
quite numerous, enough so to meet all the demands for the article, and 
furnish employment to thousands of individuals, and the consumption 
of all the wood which can be spared for this manufacture. 
The relative location of the beds and veins of iron, cannot be well 
understood, without the aid of maps. The course and direction of those, 
which belong to the distinct geological formations, will be exhibited on 
the county maps when published. 
[Assem. No. 200.J 23 
