Miscellaneous Intelligence. 277 
men of the establishment, although in the midst of an atmosphere con- 
taining much of the oxyd, suffered at all from it. ‘The white oxyd of 
zinc had also been fabricated for some months, without any ill eats4 
although the men breathe considerable quantities of the oxyd. 
nehor-Ice ; ; by Prof. C. Dewry.—Water enti freezes 
upon stones below the unfrozen surface of the water. Fastened in this 
way, It passes under the common name of anchor-ice. As soon as . 
the i ice is detached, it rises to the surface and floats upon it. In ex- er 
thick, over stones several inches in diameter as well as on smaller ones § 
of a spongy or fibrous appearance under the water, but composed o 
flat irregular crystalline plates or tables, with regular angles and ters Sas 
_Minations, cohering or hype along upon each other, exceedingly — 6 ee 
hite and beautiful ; the surface of the water is fre mice, 
and the temperature of tha Heed is at the freezing point as as shown ‘by 
4 
t 
; Stones lay loose on the: bottom, often on sand, and had~ no. ae ae 2, 
. with rocks which sometimes extended from the: bottom to air or f eee ; 
2 frozen earth in the banks out of the water. This ice was form “ 
one the bottom, probably for ae where the same circumsiances*' 
i occurred. I saw‘it also.on wood under water, and in one instance on ~ +. 
a nes fresh sawed-from a log of he sale, The depth to the ice (be: ~ + 
_ low the surface of the water) was from a few inches to three feet, ang 
__ the water sometimes nearly still and at other places in rapid motion & te 
bes prmviple af this p henomenon is probably the same as th SK: 
lowi 
satiated cclulie of some salts, as s sulphate of soda, ata high en 3 Sa 
ture, may be gradually cooled at rest without depositing the rik Se 
The agitation of ‘ne cooled solution, on panne, a-rod of glass, wood 0 : 
a into, it, commonly, but not always, causes the deposition of the FY 
Substance, A crystal Sagoo 4 into si Solution gi arabe Tegins = 
n of [tis well 
So 
> 
: a ~~ i? * 
; : a roe =} a si .- bo 
ow 32° without freezing, | bat t a lit : agitation, pro- 
of ie of the water in long & faminated ° ey 
o* 
