; 
AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.] 
Fe ctaneaae ato 
Ant. XXXIL— Observations of the Transit of Venus, Dec. 6, 
1882, at Princeton, N. J., and South Hadley, Mass. (Com- 
Municated by Professor C. A. Youne.) 
I. STATIons. 
THE observations of the Transit of Venus in Princeton were 
lade at three different points: at the observatory of the John 
- Green School of Science, at the Halsted Observatory, and at 
the private observatory of Dr. S. Alexander. 
the astronomical latitude and longitude of the first-named 
Station are, respectively, 40° 20’ 57-8, and 9™ 34°54 east of 
ashington. Its geodetic lat. and long. are 40° 20’ 54’”0, and 
74° 39 16-9 west of Greenwich, determined by reference to a 
neighboring Coast Survey station, and using Clark’s spheroid. 
The Halsted Observatory is 1-98 south and 29’°06 west of the 
8.8, Observatory, and Dr. Alexander's station was about 40 
feet northeast of the Halsted Observatory. _ A ea 
he observatory at South Hadley is in latitude 42° 15’ 18’, 
and its approximate longitude is 18" 05*-0 east from Washington. 
IL Tie. 
The time used at Princeton was that of the standard sidereal 
Clock of the S. S. Observatory. The beats of this clock are 
Communicated electrically to every room in the building, and 
to the Halsted Observatory, and were used directly by all the 
“Servers, except Dr. Alexander. The error of the stand 
Am. Jour. aor TERY Series, Vou. XXV, No. 149.—May, 1883, 
