Dec. is, 1920 Effect of Temperature and Humidity on Citrus-Canker 493 





I 



H 



His 



•dO 





H«g 



o_o 00 0000 



.0 >> 



5 <* 



00 Oi 0« ^ 00 Oi ^ Ot 00 Oi © o> 

 O* O* O* O* O* ON OS 0» On O* Ov ON 



o 4*o oi o ^?^d £ d **>© d» 



caa sjaaa & a a a 



2 ^"2 

 tu'5'3 >. 



