masses of several feet across;" the proportions vary widely, and only the richest rock is worked, which is done by crushing and washing. The quarries are situated in the Hudson River Valley near the boundaries of Essex and Warren counties, the principal shipping point being the town of North Creek. Several companies are at work.
TOURMALINE.
CONNECTICUT AND MAINE.
The recent remarkable discoyeries of colored tourmaline in southern California haye somewhat eclipsed the old New England localities, but within the last year some very fine gem material has again been taken out both in Connecticut and Maine. The resemblances between these remote regions, both in the character and in the association of the minerals found, are very remarkable. Lithia minerals of various kinds, notably the gem tourmalines, occur in almost identical ways in veins or dikes of pegmatite in San Diego and Riverside counties, Cal., as at Haddam Neck, Conn., and in Oxford County, Me., although separated by the entire breadth of the continent and with scarceh* any occurrences in all the intervening area.
AUSTRALIA.
Tourmaline of gem quality has been recently announced from Kangaroo Island, South Australia. The government geologist. Mr. H. Y. L. Brown, states that the crystals are very large and tine and yield beautiful gems. They are usually green, and some have also the pink center so often seen in Brazilian tourmalines. Six specimens have been described and figured in the records of the Australian Museum, for December, 1904, by Mr. C. Anderson:" these crystals were from the Mining and Geological Museum at Sydney.
JADEITE AND CHLOROMELANITE.
GUATEMALA.
Dr. Max Bauer, of the University of Marburg, has described a number of prehistoric objects from Guatemala made from jadeite and chloromelanite.''
QUARTZ.
THERMOELECTRIC PROPERTIES OF QUARTZ.
The thermoelectric properties of quartz crystals haye furnished a field of fascinating research in molecular physics which now affords renewed interest in its relation to radio-activity. Sections of smoky quartz, decolorized by heating, regained their color by ten days of
"Anderson, C Mineralogical Xotes. Xo. 1; Ree. Austral. Museum, vol. 5, pt. 5, December, 1904, pp. 302-308. frCentralbl. neues Jahrbuch lur Mineral., 1904, pp. 65-79.
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