160 



long-nosed species, on the contrary, moves to the deep water, 

 there to devour its prey. They take the bait readily at all sea- 

 sons and all times of day, being much more voracious than the 

 other species ; the same individual is frequently caught after hav- 

 ing been several times drawn from the water. They live longer 

 out of water, and remain flaccid for a greater length of time after 

 death ; their sight is much stronger, and they move quicker. In 

 warm weather, and in certain localities, it is necessary to trail 

 deep and slow for the shovel-nosed pickerel, or they will refuse 

 the bait, — and even then the bait must be of a kind they specially 

 prefer ; the trout-pickerel, on the contrary, will take almost any 

 bait, at the surface or beneath it, moving fast or slow ; its vorac- 

 ity is such, that it is known to take the bait with the tail of a yet 

 undio-ested fish visible in its mouth. 



Dr. C. T. Jackson exhibited some crystals of green 

 feldspar, from the sea-wall, near Southwest Harbor, 

 Mount Desert, Maine. 



It is found crystallized in quartz veins and pockets, near the 

 shore, in a rock exceedingly hard. It is abundant, and some 

 crystals are found four inches square, polished by the sea water. 

 Heretofore this has only been found in Siberia, and is consid- 

 ered rare and valuable. It admits of a high polish, and is valued 

 as a gem under the name of " Amazon Stone." Crystals of yel- 

 low feldspar were also found in this locality ; both by Dr. W. F. 

 Channing. 



Dr. Jackson also exhibited specimens received from 

 M. Daubree, of Strasbourg, of the minerals artificially- 

 produced by his process referred to at the meeting of 

 April 6, 1859, — viz. chabasie, apophyllite, harmotome, 

 and quartz crystals. The bricks from the old Roman 

 woiks, acted upon by the hot waters of Plombieres, as 

 well as the cement, displayed zeolitic minerals in their 

 interstices. The specimens of quartz were microscopic, 

 but were pronounced by Dr. Bacon to be quartz crystals, 

 whose sharp angles show that they could not have been 

 dissected out of the glass matrix. 



