Scientific Intelligence. 
Chronometer Comparisons. 
41) 10" 54° 30"0. = B. 12° 52" 10°06 
H..15.. 86 16:0 Be is 82 6G 
H. 18 44 540 =M. 20 48 15° 
The corrections to the time-pieces are tabulated below. — 
i At II. 
4H = — 2™ 43°56 = — 2™ 43°55 
4S -= + 0™ 18*:09 — OY 17°90 
4B = — 0™ 24°51 = — 0” 245°65 
Whence the observed times are (Chicago mean times) 
HOLDEN Comstock 
I 20" 14" -96"2 I; 20" 14™ 46°6 
IL (a) 20 33 24-0} II. (a) 20 33 15°4 
3 3°9 338 2674 
(c) 20 34 11°8 (ce) 20 38 37°83 
(2)20 34 24°8 (d’}20 38 42°3 
The predicted times of I were— 
Nautical Almanac 20" 13” 10° Chicago mean time. 
hrbue 2 20 = 
Alm vaque Nautico 12° 3g ey 
The seatuad times of IT were— 
Nautical Almanac 20" 33” 51° Chicago mean time. 
2 58 eh 
Berliner Jahrbuch 
Almanaque Nautico 8 vs 
BUOLENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND Puystcs. 
On an improved Apparatus for Gas Analysis.—GEPPER? 
ey described some Sinprovementa’ w which he has made in the 
Bunsen eudiometer and its surroundings in order to lessen the 
work of reduction. The eudiometer itself, which is 80™ in length, 
end is immersed in mercury contained in a pe battery jar 14% 
high and 12™ in diameter gece bottom of this jar is covered to 
a depth of 15°" with a1 us cement, in which the inside ves- 
sel of mercury is fastened. “The eudiometer and barometer tubes 
