On the Metallurgical method of Whelpley and Storer. 305 
The quartzite boulders in the region referred to are promiscu- 
ously intermixed with those of other metamorphic and of gran- 
itic origin, but those of the red quartzite are everywhere a little 
less waterworn and more angular than the others, suggesting a 
less distance of transportation, which would really be the case - 
if derived from the pipestone region. 
Towa City, Iowa, Feb, 14th, 1867. 
Art. XX XIII.—On the General Metallurgical method of Messrs. 
Whelpley and Storer ; by T. Srerry Hunt, F.R.S. 
x 
ores, designed and introduced by Dr. James D. Whelpley and 
1. Jac i 
machine with fifteen horse-power will break to the size of sand 
and coarse gravel eighteen or twenty tons of quartz or hard ore 
per h 
