TRANSACTIONS OF THE SECTIONS. 



56S 



The following table shows the sum of the diminutions per 

 cent, of quantity of rain at the two upper stations for two years, 

 with a column of numbers inversely proportional to the tempera- 

 ture during the several parts of the year. 



Whole year . . . 

 7 cold months . 

 7 warm months 

 5 cold months . 

 5 warm months 



Winter 



Spring 



Summer 



Autumn 



48-6 

 61-9 

 41-7 

 74-8 

 47-1 

 82-2 

 60-2 

 30-4 

 57-5 



Mean values o{d-\-d', whole year . . 

 7 cold and 7 



warm months 

 5 cold and 5 



warm months 

 3 cold and 3 



warm months 

 SpringandAu- 



tumn 



General mean (A) 



64-6 

 79-0 

 56-4 

 71-2 

 57-1 

 73-4 

 72-7 

 52-2 

 56-9 



59-75 

 62-55 

 59-55 

 61-80 



56-6 

 70-4 

 49-0 

 73-0 

 52-1 

 77-8 

 66-4 

 41-3 

 57-2 



56-60 



60-91 



117-51 



58-75 



At 



7 



58-7 

 69-4 

 51-0 

 72-0 

 48-4 

 78-0 

 59-5 

 46-6 

 58-6 



2-1 + 

 1-0— 

 2-0+ 

 1-0— 

 3-7- 

 0-2+ 

 6-9— 

 5-3+ 

 1-4+ 



11-0+ 

 12-6— 



By comparing the last column with the mean values of of + d', 

 their almost exact coincidence will be immediately evident ; and 

 therefore it appears that the conclusion advanced in the last 

 Report, p. 408, as to this value being an inverse function of the 

 temperature, is now strongly supported by additional observa- 

 tions, the whole nearly agreeing with the simple formula 



Y = d+ d'. 



On the Difference of the Quantity/ of Rain at different Heights 

 above the Surface of the neighbouring Ground. By Luke 

 Howard, F.R.S., J-c. 



The author, referring to the experiments on this subject, 

 printed in the second volume of the Reports of the British As- 

 sociation, pp.401, &c., proposes a diflferent opinion as to the 

 cause of the augmentation of the quantity of rain at the lower 

 stations. 



2 o 2 



