Mr. Bond on Occultations and Eclipses. 83 
effect produced by the sun’s rays; that being the mean of 
seven observations. The extreme difference from the mean 
was two divisions. A lens produced a lively motion in this 
Thermometer at 1 h. 40m.; although when the same lens 
was applied to a common mercurial one, the effect was not 
perceptible. At 2 h. 30 m. the Thermometer on the north side 
rose to + 30°. Clouds prevented further observation. 
