FOR THE ADVANCEMENT OF SCIENCE. 511 
Professor W. C. Kerr on the **Probable Origin of the South Carolina 
Phosphates.” The physical circumstances of tie deposition of these 
beds in their present situation, have been explained in a manner suffi- 
terials which compose them,—the elimination and accumulation of such 
enormous quantities of phosphate of lime in so peculiar a situat 
The recent discovery of the singular Brachiopod, Lingula tasters ig 
in the shoals along the sounds of North and South Carolina furnis 
lution of the mystery. This shell, it will be remembered, consists of phos- . 
phate instead of carbonate of lime. Its habitat is at the precise level of 
eA l 
loses its form and furnishes only its solid material, to be agglomerated by 
some concretionary or other chemical or chemico-mechanical force into 
the nodular masses which are so peculiar to this formation 
THE MICROSCOPICAL SUBSECTION OF THE AMERICAN ASSOCIATION FOR 
THE ADVANCEMENT OF SCIENCE, Which was initiated at the Salem meeting 
last year, was continued with renewed interest and increased numbers at 
the Troy meeting this summer, and promises to be a permanent and use 
ful division of the Association. Under the Constitution, as amended this 
year, this department is removed from Section B (Natural sane and 
recognized as Subsection C of Section A (Mathematics and Physics 
croscopy applied, the use of the instrument, being chiefly a department 
of Natural History. To avoid confusion at this Spi nesa of Natural 
History papers designed for this department should n a memorandum 
to that effect upon their MSS., as a request to the doen committee to 
B. 
Professor S. S. HALDEMAN, of Columbia, Pennsylvania, was elected 
Vaid Chairman this year; and Dr. R. H. Warp, of Troy, 
Secret 
petals this subsection, having been recently formed, has necessarily 
fraction, and which cannot fail to be a valuable addition to the resources 
f the working microscopist; and **on the Illumination of Binocular Mi- 
oscopes," by Dr. R. H. Ward, of Troy, suggesting convenient means of 
: a illumination in the naturalist’s every day work with the micro- 
cope, and urging that professional microscopists make their Lea 
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