214 A TREATISE 



been able to obtain, is extracted from an abridged 

 Exposition of the System of Mr. Toaldo upon the 

 probability of the change of weather by the lunar 

 points taken from the Journal des Sciences Utiles, 

 and published in the Calcutta Magazine for Jidy and 

 August 1 793. Mr. Toaldo, it appears, in order to 

 ascertain whether the moon had any influence on the 

 Mercury, collected a journal of the Barometer kept 

 tor several years, from which he discovered that the 

 Barometer was six-tenths of a line higrhcr at the 

 times of the quadratures than at the syzygies. 



If this journal was kept correctly on a proper 

 plan, periodical septenary changes in the Barometer 

 connected with the revolutions of the moon, are esta- 

 blished of course. But if it was kept in the ordinary 

 way of assuming two or three observations taken in 

 the course of the day, to serve as a standard or rule 

 for estimating the state of the whole twenty-four, it is 

 evidently liable to errors which render the calculation 

 precarious and inconclusive for the reasons already 

 explained, which however had not occurred to me at the 

 imeofwriting my last Treatise on Sol-Lunar Influence. 



■That the Barometer will be differently afTec ted at 

 the springs and neaps, is an anticipation which has 

 in its favourthe strongest probability that analogy can 

 afford. Yet, upon a review of the observations col- 

 lected during the springs and neaps of the lunation 



lich I have observed, I cannot say that, when ar- 

 ranged as they stand in the Synopsis, in coincidence 

 with their respective periods, they exhibit a differ- 

 ence of character to establish this conclusion. We 

 therefore leave it to the decision of a far more exten- 

 sive 



