550 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Diagram 1. — This diagram (fig. 160) is intended to show at a glance 

 the general character of the weather of each month of the year as regards 

 temperature and rainfall. For instance, it will be at once seen how 



Diagram 3. — Mean Temperature of the Air at Chiswick, compared ivith 

 the Mean Temperature of the Soil at 1 ft., 2 ft., and 4 ft. deep, for each 

 Month during the Year 1903, taken at 9 a.m. 



Temp. 



Jan 



Feb 



Mar 



April 



May 



June. 



July 



Aug. 



5epr 



Oct. 



Nov 



Dec. 



Deg 

 64 



























63 















K 













62 















/ \ 













6/ 















A 



*\ 











66 













! 



li 

 fi 













59 













; 



i . 



it 





V 









58 















— ^ 



r 











57 













* /' 















56 



















Y 



k 







55 



















\ 









54 











/i ■ 



tf 











• 





53 











h > 



1; i 



/ 









\ \ \ 

 \\\ 







52 











]! i 

 11 ^ 

















5/ 











If * 



ff / A 











— V" 







50 











'/ / 



/ f 











T — T 







49 























v 1 



-T-j 



\ 



48 























\ \ 



V 



47 























H ^ 





46 









# 



/ 7 

















v — 



45 























-VV 



\ 



1 



44 





Is 























43 





f f' 



. t 























42 



/J 

 • / 







Me a 



n te 



mper 



arure 



of th 



e a/r 









4/ 









Me a 



n re 



mper 



arure 



oFrh 



e so/ 



/ 







40 









at 9 



am. 



ar / 



Foot 



Jeep 











39 



• 







Me a 



n te 



mper 



arure 



oFrr? 



e 50/ 



1 







38 









at 9 



a.m. 



at 2 



Feet 



deep 











37 









Mea 



n re 



mper 



arure 



oF/h 



e 50/ 



f 







36 









at 9 



am. 



or 4 



Feer 



Jeep 











35 



























Fig. 162. 



unseasonably warm were those months which may be termed the " winter " 

 months, and on the other hand how persistently cold the weather 

 continued during the greater part of the summer half of the year. 



