378 Report on the rc-examination, 6^c. 



thinks it may have been formed by subUmation, and accordingly 

 he infers that coal may exist beneath this spot, and that the por- 

 tions visible have been volatilized by the agency of .trap, which 

 rock he supposes, from the situation of the sandstone, lies at a 

 depth of between one and two hundred feet below the bed of the 

 river. If Prof. H. is right in his conjecture, the coal must be 

 reached before the above mentioned depth is attained. 

 Under the head of ores, we make the following extracts: 



1. Carhojiate of iron at Newhury. Sp. gr. = 2.94. Consists 

 of 



Carbonate of lime, -_ - - - 45.67 



" magnesia, - - - 8.97 



" iron, - . - - 21.76 



" manganese, - - - 16.10 



Silica and alumina, - - - 3.34 



Loss, 4.16 



It is very abundant. 



2. Magnetic iron in Warwick. It is very abundant, but is 

 not worked on account of difficulties experienced in its reduction. 

 Sp. gr. = 4.47. Analysis. 



Oxides of iron, ----- 66.4 

 Oxide of manganese, - - - - 16.6 

 Silica and alumina, - - - - 17.0 



3. Chrome iron ore. This valuable ore is found in Chester, 

 •where it occurs in serpentine, in couches from 5 to 18 inches wide. 

 According to Dr. Holland it contains traces of platinum. 



4. Limonite {Hematite). This is abundant at several places in 

 Berkshire County, where Prof H. admits that the beds extend 

 downwards into, and are embraced by the older rocks. 



5. Copperas. The amount of this annually manufactured at 

 Hubbardston.is seventy-five tons. 



Several new localities of galena, blende and copper-pyrites are 

 indicated ; and the report concludes with brief notices of ochres, 

 clays, water-cement, soap-stone and serpentine-marble. 



On the whole, the present work will be found to sustain the 

 character of the more volummous report by v.^hich it was prece- 

 ded, and cannot fail of advancing the agricultural prosperity of 

 the state, to an elevation corresponding to that which she has 

 reached in the arts and manufactures. 



