1888. | NEW YORK ACADEMY OF SCIENCES. 9 
the thoria approximating 70 per cent, water 10, and silica and 
phosphoric acid each 73 to 8, from several analyses. 
Sulphohalite is proposed as the name for a new mineral from 
Borax Lake, Cal., associated with hanksite, or implanted upon 
it. The crystals are isometric, in sharp and perfect rhombic do- 
decahedrons, transparent, and faintly tinted with greenish-yel- 
low. ‘Their size varies from .2 to nearly an inch in diameter; 
hardness, 3.5; sp. gr. (estimated in naphtha), 2.489. Analysis 
gives the formula 
3Na,SO,,2NaCl. 
But three crystals are yet known, two in the Bement cabinet in 
Philadelphia, and athird, used in part in the present investiga- 
tion. It is the second species known in mineralogy having the 
composition of a sulphato-chloride, the other being Connellite, 
from Cornwall, England, in which the base is copper. 
The analyses of both these remarkable minerals have been 
made by Mr. James B. MackInTosH; and fuller particulars are 
to be given in the Amer. Jowr. Science for December, 1888. 
Dr. BoLTon announced the decease of a corresponding mem- 
ber of the Academy, Pror. RacHeL L, Bopiey, Dean of the 
Women’s Medical College of Pennsylvania. He spoke of the 
high abilities and excellent work of Dr. Bodley, and of the im- 
portant part that she had borne, in 1874, in the plans that led 
to the convention of American chemists and the Priestley Cen- 
tennial, at Northumberland, Penn. 
THE PRESIDENT spoke of his observations during the past 
summer, first in Colorado, and then abroad, at the International 
Congress of Geologists in London, and after that in Belgium, 
visiting some very remarkable palzontological collections and 
museums at Brussels, Liége, and Aix-la-Chapelle. Of these, 
he would speak more fully hereafter. 
The paper of the evening was then read :— 
THE TRUE CAUSE OF SONOROUSNESS IN SAND. 
By Auexis A. JULIEN and H. CakrINGTON BoLTon. 
Dr. Julien, in the course of his reading, called upon the 
Secretary to open and read a sealed packet deposited with the 
Society on September 27th, 1888. 
