170 Scientific Intelligence. [Fzx. 
S., 8; W., 4; S.W., 11; N.W., 1; Var., 3. Snow and rain, 
3°02 inches, which exactly agrees with the amount for the last 
month. 
The changes in the density of the atmosphere again form the 
most prominent feature in the register; and the ranges in the short 
periods about to be noticed are most extraordinary. On the Ist the 
column indicated the maximum which closed the preceding month; 
but from the afternoon of this day to the 6th there was a very gra- 
dual depression of about two tenths of an inch daily; and during 
the night, which was stormy, with snow, the loss of quicksilver 
was equal to a full inch. On the following day this quantity was 
nearly restored. Rain by day, and frost and snow by night, con- 
tinued, with an unsettled and depressed barometer, and high 
winds, until the 14th; when the wind at midnight became most 
tempestuous, with heavy rain and snow. Of the violence of this 
storm here (and it appears to have been general) some idea may be 
formed from its effect on the barometer, which from ten, p.m. 
(the 13th) to eight, a.m. the next day, was depressed nearly an 
inch anda half, viz. from 29:30 to 27:90! At this unprecedented 
point of depression it remained stationary above eight hours, with 
the wind at S.; nor did the column begin to rise until the current 
became more westerly ; and an increase of seven tenths on the 15th 
was succeeded by a similar decrease on the 17th. Notwithstanding 
the wind blew furiously from the N. and N.W. during the night of 
the 18th, with abundance of snow, another increase of a full inch 
took place ; and the barometer kept steadily rising the whole of the 
next day, which was also stormy, with heavy showers of snow, 
when it nearly indicated its former maximum of elevation. A severe 
frost, with a dense and clear atmosphere, marked the 20th; the 
temperature at eight, a.m. being 16° below the freezing point. 
On the 21st the diurnal temperature never passed 23°; but about 
ten, p.m. it had risen to 27°; and the wind changing from N. to 
S.W., a thaw immediately followed, with rain. A very sudden 
increase of temperature, an unsettled barometer, and violent gales, 
accompanied with driving showers, continued to the 28th, when 
the wind blew violently from the S., with heavy rain. The baro- 
meter during the night again parted with another inch of quick- 
silver; and the next morning, the wind having veered to the N.W., 
this loss was regained. 
JAMES STOCKTON. 
XXI. Philosophical Apparatus. 
Mr. Singer is prevented from continuing his public lectures by 
severe indisposition, which renders it uncertain at what time they 
may be resumed. The extensive collection of philosophical instru- 
ments hitherto employed in illustration of these lectures are in con- 
sequence to be brought to public sale in a very short time. 
