842 Mr Forbes on the defects of' the Sympiesometer, 

 59 B Q^.^B' 60.2 29.90 158 27 



This table seems peculiarly fitted to verify our hypothesis, and, 

 if taken singly, would be no insufficient proof of its correctness. 

 The general tendency of the sympiesometer is to rise, and of the 

 thermometer to sink, but their minuter oscillations prove more 

 closely their connection. The fall of the latter is steady, ac- 

 companied by the ascent of the former, till Obs. 60, where the 

 stationary condition of the oil is succeeded by an evanescent 

 rise of 0®.l in Obs. 62. The subsequent descent of .02 in the 

 oil is perfectly accounted for by the almost stationary condi- 

 tion of the thermometer at Obs. QB^ and its rise of 0°.2 at Obs. 

 6Q> When its renewed gradual descent continues to raise the 

 sympiesometer, or render it motionless till the conclusion of 

 the series : the positive height indicated is much too great. 



Table VI.— July 9.0th, 1825. 



I 



