168 Association of American Geologists and Naturalists. 



Resolved, That on Friday at 9, A. M. the Association proceed 

 to the choice of officers for the next annual meeting, and also to 

 fix upon a place for the same. 



Prof. Locke read a paper describing a new instrument invented 

 by himself, and which he called a Reflecting Level and Goni- 

 ometer ; he described a reflecting compass of his invention, and 

 read a paper "on a Prostrate Forest under the Diluvium of Ohio." 



Prof Hall made some remarks on the wood found underneath 

 the drift in Washington. 



Prof Hubbard offered some remarks on the drift of New Hamp- 

 shire, exhibiting a remarkable specimen of a bowlder of smoky 

 quartz containing acicular crystals of rutile. 



Resolved, That Prof. Hubbard be added to the committee on 

 drift. 



Dr. C. T. Jackson read a paper " on the Tin Veins of New 

 Hampshire," exhibiting specimens of the ore both crystallized and 

 compact, and an ingot weighing three ounces of the reduced metal 

 obtained from five ounces of the ore, the accompanying minerals 

 of the vein at Jackson, also specimens of the yellow blende of 

 Eaton and the black blende of Shelburne, with a specimen of 

 the reduced metal from each, and a specimen of the associated 

 lead ore. 



P7'of W. B. Rogers adverted to the occurrence of oxide of tin 

 in Virginia, associated with the auriferous quartz and other min- 

 erals of some of the gold mines. As yet he had discovered it at 

 only a few localities. It is in the form of very small crystals 

 scattered at wide intervals, and even where it occurs is perhaps 

 the rarest of all the metallic minerals found in and contiguous to 

 the gold veins. In the two or three instances in which it was 

 found in place, it was imbedded in a talco-micaceous slate, near 

 its junction with the auriferous quartz. The minerals met with 

 in the talcose and micaceous slates, which usually include the 

 veins and beds of auriferous quartz, are auriferous, common, ar- 

 senical and cupreous sulphurets of iron, sulphuret of copper, car- 

 bonate of copper, sulphuret of zinc, sulphuret of lead, sulphur in 

 minute crystals lining the cavities of cellular quartz, metallic 

 gold, peroxide of iron, phosphate of lead beautifully crystalline, 

 oxide of tin and oxide of bismuth, both exceeding rare. 



In connection with Dr. C. T. Jackson's remarks on the occur- 

 rence of sulphuret and other ores of zinc in New Hampshire, 



