128 
became tremulous and lighter in colour before it disappeared 
behind the body of the moon; there was no visible cloud 
passing at the time and the sun’s edge was sharply defined 
and perfectly steady. 
During the progress of the eclipse the serrated edge of 
the moon was beautifully distinct, powers from 50 to 320 
were used to look at the prominences on the moon’s edge. 
I had several telescopes directed to the sun ; some of these 
had 4J inches and 5J inches diameter object glasses. The 
value of aperture in observing the edge of the moon and the 
faculse on the sun’s disc was very manifest when using the 
inch diameter glass. 
The temperature in the sun during the eclipse was taken 
at intervals with a very delicate black bulb mercurial ther- 
mometer. The record shows that the increase of temperature 
due to the increasing altitude of the sun was greater than 
that of the opposite effect caused by the obscuration of the 
disc until nearly the time of the greatest phase. The effect 
of passing clouds is shown by the fluctuations of the mercury 
during the progress of the eclipse. 
Temperature 3 feet 6 inches above ground. Black bulb 
in sun. 
h m 
39° 8 20 
39-25 8 34 
39-5 8 48 
39-75 8 58 
39- 1 9 11 
38-75 Greatest Phase 9 32 
40- 9 58 
40-2 10 3 
40-5 10 7 
40-1 10 19 
42- 75 10 28 
44-25 10 40 
43- 4 End 10 50 
