Sor the Advancement of Science. 397." 
Col. Sykes went sone hak ine detail regarding these and other ob- 
servations of Lieut. Strachey, in the course of which he stated that 
the ome of Dr. Apjo obn for the reduction of the* ae ] id dry bulb 
had si the numerical coefficients of Mr. Glaisher, which | aoe 
mperature, and which that gentleman had tabu lntege-abuch 
applicable to Indian hygrometry. 
I. Sykes then gave a brief account of several storms of hail wie ame 
y Buist.- 
) 
ap, 
with, Te 
and with that peculiar ranted. stucitne which he had-elsewhert de- 
scribed. Immense aggregated masses of these great™hailstones were — 
in some places bro ught down from the mountain ravines by the suc- 
mt and in one of these conglomerations a snake was 
found ‘up and apparently dead, but it soon thawed and revived. 
Cate es of the Rise of the Isothermal Lines in wa Winters of 
the. Northern Hemisphere ; by Mr. T. Hopxin 
-, Hopkibe ‘éxamined some of the isothermal lines exhibited in the 
to these northern latitudes, what is the cause of such temperature being 
found there ? reply i is Aha sie by Prof. Dove himself, where he 
says,— This surface,” meaning the surface’of the globe, “being a 
highly varied one, the sun’s influence on it is also constantly varying, 
for the impinging solar heat is employed jn raising the temperature of 
substances which do not change their eondition of aggregation ;—but 
when engaged in causing the melting of ice or the evaporation of water 
ern declination, enters the southern signs, the increasing proportions of 
liquid surface upon which it shines cause a corresponding rt of its 
rn hemispheres? And why not trace the effects of condensa- 
tte vapor, as are as of the evaporation of water? It is evident 
that heat is absorbed and made latent wherever vapor is produced, and 
is equally clear vii this heat is given out and made active wherever 
