G. W. Hough on an Automatic printing Barometer. 53 
May 10th. Bar. 29:91 in. Clou- 
dy, a light breeze from the south. 
: The violent agitation of the baro- 
metrical column, clearly indicates an approaching storm. The 
small amount of depression, however, ibe that this storm will 
hot be very violent at the place of observation. 
€ may here remark, that a few months obeervailiin by this 
method, has led us to surmise, that the barometer as a weather 
Indicator, does not depend so much upon the amount of the va- 
Nation, as upon its quality. If the barometer is depressed 0-2 or 
0°3 of an inch, and the curve is smooth and regular, it does not 
Indicate a sudden change. But, if the curve exhibits a violent 
tremor, it may be taken as a good indication of an approaching 
_ Storm. In how far these views are correct can only be deter- 
Mined by a long series of careful observations. ogg (es 
May llth. Bar. 29-70in. The curve is rather a remarkable 
One, from the fact that apparently there was but little atmos- 
pheric disturbance at this place. It shows, however, that the 
atmosphere was in a violent state of agitation, from 3 P. M. of the 
lth, to 4 a. ut, of the 12th. During the afternoon of the 11th, oS 
the weather was very changeable; clouds were continually pass- 
DUDLEY OBSERVATORY. One of the peculiarities of this 
May 11th, 1865. method is, that we can print our 
Pie. ! ! Baneanistees results at any number of places, 
a eee rovi we have telegraphic 
HOURS. communication. One oti 
Odi 9S ek barometer ma ade to re- 
Berit cin Bey cord its indications at fifty dif- 
haat JR gae ferent points at the same instant. 
: : ; ; _ The accompanying lithograph- 
fg ayes ic sheet: exhibits a few of the 
é °% get 4g more remarkable diurnal baro- 
 -% So og metric curves as recorded by our 
gh goes apparatus. The first three curves 
git'¢ 4 126 belong to the scale. as given. at 
ee ge ey the top of the sheet; the remain- 
aA rh cee ee a6 ing ones to that given at the bot- 
oe Ee oe tom. The height of the barom- 
13 7 O:729 eter is given for noon of eac 
ts ee lee The scale of the curve is 
rt Aine ff 8-077 times the barometric pres- 
16 7 7 6 sure. From these data, the baro- 
Pei «oy Vonage metric height for any other time 
3 i 8 ; can be deduced. : 
30% 9 . 4 The following remarks will 
speek be dae show the apparent atmospheric 
29 " yor s condition at the time 
8 0 1 
8 0 : 
