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 Gront- 
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 undemeakh 
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 ee the Tin Veins of New 
Hampshire,” exhibiting specimens of the ore both crystallized and 
compact, and an ingot wilgling 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 
Prof. 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, at- 
senical and cupreous sulphurets of iron, sulphuret of copper, cal- 
-bonate of copper, eRe of zinc, sulphuret of lead, siilphur in 
minute crystals lining the cavities of cellular quartz, metallic 
gold, peroxide of iron, phosphate of lead beautifully crystalline, 
— of tin and oxide of bismuth, both exceeding rare. 
In connection with Dr. C. T. Jackson’s | saneailiasan: too neaete 
rence of sulphuret and other ores of zinc in ii nisi 
