Re port on the Geological Survey of Connecticut. 163 
quantity at Haddam, in the granite-vein which contains the chryso- 
beryl. 
“The first sample was sent by Gov. WintHRor to Sir. Hans 
SLOANE, and was deposited with the collection of this gentleman in 
the British museum, where it was examined by Mr. Hatcuert, and 
afterwards by Dr. Wotnaston. The specimen was supposed to 
have been found near New London, which was the residence of 
Gov. Winturor ; but as the ore has not been re-discovered in that 
vicinity, it is more probable that it was obtained from the region of 
Middletown.” 
Tungsten is found at Monroe—both the wolfram, ferruginous 
tungsten, and the calcareous, besides the free oxide, which was there 
first identified.* 
Coal.—Connecticut being mainly a country of primary rocks, and 
accordingly, in three quarters at least of our territory,—in all but 
the secondary region of the valley of the Connecticut, and the lim- 
ited basin of Woodbury and Southbury,—the existence of coal is as 
certainly denied as that of rock salt in the same district. 
‘The great central valley of the Connecticut abounds in a con- 
glomerate-rock, obviously composed of fragments derived from the 
contiguous primitive ; nor is it wholly wanting in bituminous shales 
and dark colored sandstone-slates, which are the more immediate 
attendants of coal deposits. Still these have not yet been found 
collectively arranged in that order of alternation, and penetrated and 
interleaved by vegetable remains and argillaceous iron-ore, circum- 
stances which are at least requisite to constitute safe indications for 
boring. The hopes that have been entertained have been founded 
chiefly on bituminous shale and limestone, black fissile slate, and 
thin interrupted seams and grains of indurated bitumen in sandstone 
and amygdaloid. 
“Impressions of plants are of very rare occurrence at the places 
where excavations have been made, and in many instances altogether 
wanting. A cupriferous sandstone-slate in Suffield at Enfield falls, 
occasionally embraces compressed stems, apparently of calamite, 
which are converted into brown coal. Similar remains were 
noticed at Southington, in one of the quarries of hydraulic lime. 
The coal-digging in Durham also afforded some obscure vegetable 
impressions. ‘The coal from these plants burns with a feeble flame 
and a disagreeable peat-like odor. That found in trap at Far- 
* See Vol. iv, pp. 52 and 187 of this Journal. 
