The Laws Observatory. 511 
in the year 1882 by the U.S.C. & G. Survey from an ad- 
justment of a network of longitudes including St. Louis. 
We then have as the longitude from Greenwich of the west 
pier in the transit room of this Observatory 
6" 9™ 18°.33 + 0°.04. 
The longitude of the Laws Observatory of the University of 
the State of Missouri is west from — 
Washington (New Naval Obs’y) 1" 1™ 2°.62 = 15° 15! 39".3 
Washington (Old Naval Obs’y) 11 6 .29=1516 34 .3 
Greenwich 6 918.383 =9219 35 .0 
Paris 6 18 39 .28= 94 39 49 .2 
Berlin 1°23 58724=10543 18-4 
In making this longitude determination I was fortunate in 
receiving-generous aid from every one who could in any way 
contribute to the success of the work. I am under especially 
deep obligation to Professor Pritchett for the share of the 
astronomical work which he voluntarily performed, and also to 
him and to Professor William Trelease, Director of the Shaw 
Gardens, and to Mrs. Trelease for courtesies extended to me 
while in St. Louis observing for difference of personal 
equation. I am also indebted to Mr. Chas. M. Hays, Gen- 
eral Manager (now Vice-President) of the Wabash Railroad, 
for free transportation between Columbia and St. Louis dur- 
ing the progress of the work; to Col. R. C. Clowry, Vice- 
President and General Superintendent of the W. U. Tel. Co., 
for free useof their wires between Columbia and St. Louis, and 
to Mr. E. F. Ammerman, the local agent of the W. U. Tel. 
Co. for valuable assistance at this end of the line. 
