350 



On the influence of the Moon 



[July, 



10 



52 



10 



36 



10 



46 



10 



51 



In the 1st four months, 



In May and June, 



In July, 



In Aug., Sept., Oct., 



But besides the superior or direct tide of the moon, the inferior or 

 opposition tide of the moon would be in conjunction with the greatest 

 heat about the 9th day before the new moon. I took therefore the 9th 

 day with three days before and three days after it, and found the propor- 

 tions the sums bore to the whole period in the same manner as above. 



10 



42 



10 



40 



10 • 



40 



10 



: 55 



10 



40 



Seven days being to the whole lunar period, 



The proportion was — 



In the 1st four months, 



May and June, 



July, » 



Aug., Sept., Oct., 



The irregularity in the case of July probably arises from a sufficient 

 series of years not having been taken. If instead of the quantities of 

 rain we take the number of rainy days in the same periods, they give a 

 ratio of 10 : 40 



With a view of ascertaining whether similar results were to be ob- 

 served in the climate of Great Britain, I next made a table of the tem- 

 perature at Edinburgh, for eight years, (from 1824 to 1831, both 

 inclusive,) from the Edinburgh Philosophical Journal ; to this I added a 

 table for three years near London, (from Sept. 1819 to Sept. 1822,) 

 which is to be found in Danieli/s Meteorological Essays, and the results 

 are as follows : (see table No. 5 ;) taking the days as before, (viz. the 

 5th day after the new moon, and two days before and two days after it,) 

 the ratio to the whole lunar period was as follows : 



In the first four months, 



May, June, July, "I 



Aug., and Sept., J 



Oct., Nov., Dec, 



It was to be supposed that in a high northern latitude, in the three 

 last months of the year, when the heating power of the sun is very 

 small, owing to the great moisture, and also the sun and moon (when 

 it is near the change) have southern declination, that the joint 

 effect of the heat and attractive force would be barely perceptible. There 

 is, however, another cause of mistake. Though the mean time of 

 maximum heat for the whole year is 2h. 40m. p. m. yet that time varies 

 with the different seasons ; in summer it is considerably later, in winter 

 it is considerably earlier. I have not the book to refer to, but taking 

 the 6th day in the summer months for the centre of the maxima, in- 

 stead of the fifth, after the new moon, and the 2nd instead of the 5th 

 for the last quarter, the ratios are as follows : 



In the summer months : : 10 : 47 



Oct., Nov., Dec : 10 : 58 



10 



; 46 



10 



i 50 



10 • 



70 



