Miscellaneous Intelligence. 289 
veloped in a covering of muslin and moistened with water, and that of 
the other is naked. ‘ 
he rain and snow gauges, and also the wind vanes, are made under 
the direction of the Institution, by Messrs. Pike & Son, 166 Broadway, 
ew York. The rain gauge is an inverted cone of sheet zinc, 0 
which the area of the base is exactly one hundred square inches. ‘This 
cone or funnel terminates in a tube which carries the water into a re- 
ceiving vessel. The water which has fallen is measured by pouring it 
rom the gauge into a cylinder, so graduated as to indicate hundredths 
of inches. A smaller cylinder is also provided, which gives thousandths 
of inches, and may serve, in cases of accident, as a substitute for the 
larger cylinder. ‘The rain gauge is placed in a cask sunk in the earth, 
with its mouth near the level of the ground. 
The snow gauge is a cylinder of zinc of the same diameter as the 
mouth of the rain gauge. 1e measurement is made by pressing its 
mouth downwards to the bottom of the snow, where it has fallen on a 
level surface, then carefully inverting it, retaining the snow, by passing 
under ita thin plate of metal. The snow is afterwards melted, and 
tion 
have directed Mr. Green to dispose of sets, to individuals, at a reduced 
obse 
Mperature. <A set of by metrical tables, to be u: ' 
rs dry bulb eemseninag eel a set, for the calculation of heights by 
rometer, will be prepared. ie Pome Pa 
2. Notice of Meteoric Iron in the Mexican Province of Sonora; 
by Jonn L. Le Conte, M.D.—In February, 1851, while at Tucsan 
Szconp Series, Vol. XIII, No. 38—Mareh, 1852. " 
