58 Shooting Stars in November, 1865. 
The following constants and reductions have been adopted. 
30 i = 34 inches. 
D = diameter of the equal legs of the siphon. 
W = weight of mercury necessary to compensate 
It will be best to adopt d=0°80. After the tube is filled to 
the theoretical height, the whole apparatus can be subjected to 
different degrees of. temperature, in the same manner as the com- 
pensation of a pendulum. By reading the standard barometer 
or substracting mercury, the compensation can be perfected. In 
a siphon that 1s compensated for 80 inches of pressure, the cor- 
rection for different degrees of pressure and temperature will be 
very small; since for ‘L inch and 100° C., the correction will 
only amount to 0-018 inches. The largest correction required 
will rarely amount to 0:004 inches 
The principle of electrical contact, on which this method of 
recording minute changes in the height of the barometrical col- 
umn is based, ean with equal fi ncility be applied to the thermom- 
eter, anemometer and rain-gauge, and the results oneal if 
desirable. The same form of mechanism can be used with al 
the instruments, with, perhaps, some slight modifications in the 
details. 
Dudley Observatory, Oct. 28, 1865. 
Art. X.—Observations upon Shooting Stars in November, 1865. 
1. At New Haven—On Monday morning Nov. 13th, 1865, a 
party of four observers, Prof. W. D. Whitney, Mr. C. &, Rock- 
wood, Mr. Isaac Pierson, and the writer, watched for an “ei 
and fifty minutes beginning at five minutes before four. Thos 
iatesks whose paths - if extended backward were estimated to oe 
across the area bounded by the stars in the vate of the sickle 
in Leo, that is, by the stars 7, 7, £, u, and ¢ Leonis, were counted 
as conformable. The following was the neath of the count. 
From 3% 55™ to 4° 0", thatis, in 5 min. 2 uncon. 14 conf. 
- = 0 S. 445 ie & -F- ahO ey si. % 
“ 
1 
24 15 4 30 e 156 « és 57 
i 4 60... ©. 445 = in.) Ts 63. 
sc 4 45 ‘“c 5 0 “ 5 .¢ q 6c 39 “cc 
“ ee | ee oes 16% is = si. | 
- O76.) °° 6 aU - 15 19g = 45° * 
§ 8 * 5 45 * 6.4 6 * 34“ 
Total in - 110 min. 70 apeon., 360 conf, — 
