The Laws Observatory. 505 : 
piece at Columbia. For a description of it see page 489. 
Its running while the observations were in progress was only 
fair, and a month later, its performance growing worse, it 
was stopped and repaired by a local jeweler who found that 
there was something wrong with the escapement. 
Observations at St. Louis. The observations in St. Louis 
were made by Prof. H. S. Pritchett with the 3-inch Fauth 
Transit of the Observatory of Washington University, mounted 
on the western pier in the transit room. The focal length of 
the instrument is 48 inches, and the power of the diagonal 
eye-piece used is 125 diameters. The inclination of the axis 
was measured by means of the striding level, the angular 
value of one division of which is ) 
2”.156 + 07.005 = 08.144 + 0°.0003. 
The adopted correction for inequality of pivots is +0°.015. 
The reticule consists of seven vertical and two horizontal 
lines ruled on a glass plate. The equatorial intervals between 
the vertical lines and the mean of the threads as determined 
from 17 transits of cireumpolar stars are as follows: The 
threads are lettered A, B, C, D, E, F, G, in the order of 
transit of a star U. C. when the circle is West. 
Equatorial Intervals of Glass Reticule of Fauth Transit 
Instrument of Washington University. 
October, 1891. 
—18°.428 +0°.007 
— 8.911 +0 .007 
— 4.466 +0 .007 
— 0.010 +0 .007 
+ 4.432 +0 .007 
+ § .927 +0 .007 
+13 .456 +0 .007 
Q8Foan Pp 
Both times stars and circumpolar stars were observed on 
the chronograph, and usually, over the seven wires of the 
reticule. The mean of the seven threads is the observed time 
used. In case of incomplete transits the threads observed 
have been reduced to the mean of the threads with the above 
