Intelligence and Miscellanies. 189 



green tourmaline, indicolite, and siliceous feldspar, three miles 

 north west from the center of the town, on the farm of Mr. 

 Stearns. I have found only a single crystal, which I ob- 

 tained several years ago, in the granite containing the above 

 minerals: but I did not examine it till lately. A recent visit 

 to the spot did not furnish me with any additional specimens. 



The prevaiHng rock in the vicinity is mica slate, with oc- 

 casional veins and beds of granite. At the spot no granite 

 appears in place ; but numerous large bowlders are scattered 

 over an extent of several rods, where there appears to be a 

 considerable depth of soil. Unquestionably these were 

 broken up from a bed or vein beneath. It may be hoped, 

 therefore, that further research will discover a deposit of this 

 interesting metal : For in Cornwall " it is generally in the 

 vicinity of a vein of tin ore, that disseminated grains of tin- 

 stone are found in the rock." 



The specimen which I found consists of a single crystal, 

 weighing about jfifty grains : or rather of a portion of one 

 large crystal, with parts of several smaller ones, projecting 

 from it hemi'tropically. The form is evidently an octahe- 

 dron, with a square base ; but its angles, as measured with a 

 common goniometer, differ several degrees from the meas- 

 urements of the primary form of tinstone, as given by W. 

 Phillips. His results (making use of Brooke's notation) are, 

 Pon P' 133° 30' 

 Pon P" 67 52 



That from Goshen gives 

 Pon F 125° 

 P on P" 86 



Whence this discrepancy arises I am unable to say. I 

 would suggest, however, that it is not impossible, that I have 

 mistaken the true form of the crystal ; as only a few of its 

 faces are exhibited in perfection. 



As to the external characters of this mineral, it will be suf- 

 ficient to say, in general, that they correspond almost exactly 

 with the oxide of tin from Cornwall and Bohemia. Its spe- 

 cific gravity is 7.14. 



On charcoal it was readily reduced before the oxy-hydro- 

 gen blow pipe, without decrepitation ; and after reduction, 

 it burnt with the brilliant white light of tin. Tinstone from 

 Bohemia was not reduced so easily. 



In order to ascertain whether the reduced globule would 

 give the crackhng sound, so striking in metallic tin, I placed 



