1080 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



same during the daytime as at night. In December it was the high 

 temperatures at night, rather than any unusual warmth during the day- 

 time, which made this month such a very mild one. 



DIAGRAM 3. Mean, temperature, or the, air at: Chiswirk, ejimpare^ 

 uvYi the mean temperature of" the Soil at / ft.,Z 'fl.,&4ft..deep. 

 for each mouth auraig the Year 1902, taken oX 9 a. m. 



Temp 



JAN. 



FEB 



MAR. 



APRIL 



MAY 



JUNE 



JULY 



AUC. 



SEPT 



OCT. 



NOV. 



DEC 



Dea 



62 



























61 















f — . 













60 













/, 



'/ 



\ * 











59 













// 

 // 



/ 



\ 



X 









58 















7 





VV\ — 









57 













j 1 





— ^— -x~ 











56 













V 



/ 













55 













V - 



/ 





"T 









54 











/ 

 / 



ft / 



M 















53 











i 



li 



• 









\ \ \ — 



\ \ \ 







52 











I / 



// 

 ll 



4 









\\ \ 







5J 











1 1 



1 1 i 



Mr* 















\ 





50 











at 



4 II 1 











V \ 



fc. i — 



\ + 





43 











i/f 













\ \ 



4-4 





48 









hi 



'/I 

 /+ 















V- 



47 









*r 



/ 













\ 



V 

 \ 



46 























V: v 



V v 





45 









r 















— V — 



\ 



\ 



44 



A 





— t * 

















\\ 





43 







m 





Mew 



i tern 



oeraA 



tore 



iftht 



i air 



V 





42 



\ 





-jn — 



hi 





Mear 



> tern 



pera 



tare 



if th 



> Sot 



I 





41 



. \ 





i 1 



1 ! 





atS 



CL. 7 



n. at 



1 fOi 



)t de 









40 



\\ 

 \\ 



; 1 



\ — L 



1 

 1 





Mew 



z ten 



Were 



tare 



of the 



Soi\ 



r 





39 



— x \~ 

 \\ 



\ / 1 



\i i 



1 





at 9 



an 



, at 



2 fee 



C de* 









38 





* /' 



\ /' 





-X — X— 



Mew 



u ten 



pera 



'ure, 



>fth 



s Sot 



I 





37 





A /'' 

 \ / 







al 9 



an 



t. at 



1 fee 



) olee, 









36 



























35 



























Fig. 258. 



Diagram 3.— It will be noticed (fig. 258) that in the coldest month, 

 l\ bi nary, the soil at four feet deep was, on an average, nearly 7 degrees 

 warmer than the air ; at two feet deep it was 3 degrees warmer than the 

 air ; but at one foot deep the soil and air were at the same temperature. In 



