23 



Mean horizontal Parallaxes of the Sun, as deduced from the best 

 observations of the late transits of the planet Venus over the 

 Sun's disk. 



From the American observations of 1761,- - - - - - - 8,6500 



From the American observations of 1769, ------- 8,6045 



From a Mean of Mr. Short and Dr. Hornsby's best observations, 8,8500 

 By professor Euler's deductions, ---------- 8,6800 



By those of Mr. Pingr6, 8,8000 



Mr. Le.xel, ..---- 8,6300 



Mr. Sejour, - - - - 8,8100 



Mr. Lalande, 8,6000 



A mean of these eight deductions gives ------- 8,703. 



For the sun's mean horizontal parallax, which is very near 

 the single result obtained by Dr. Maskclyne, from a compa- 

 rison of the observations made at Otaheite, and Wardhus, 



viz. 8",72. 



From 



