254 



Transactions of the Canadian Institute. 



[Vol. VII. 



V. 



VI. 



June 



26 

 26 

 26 

 26 

 26 



Time, 

 (o'clock). 



5.00 



8-35 

 1 .00 

 2.20 

 4. 10 

 5.10 



'Distance, 



56 



212 



175 

 128 



41 

 28 



Date. 



June 22 



23 



Time. ^_. 

 (o'clock). , U'stance. 



8.45 

 I .00 

 2.40 



4-35 

 8.10 



772 

 712 

 691 

 691 

 995 



Temp- 

 erature. 



75 

 73 

 76 



77 

 71 



Hum! 

 dity. 



93 



85 

 80 

 82 



79 



I. Liriodendron leaf; upper side up ; pressure four inches ; d'lag. VII. 



SUMMARY OF MEASUREMENTS. 

 Upper Side of Leaf Uppermost. 



Lower Side of Leaf Uppermost. 



206 mm. (increase). 

 272 " 



184 " 



— 25 mm. (decrease). 

 — 216 " 



Number of Stomata per Square mm. 



The larger number denotes decrease, and the smaller increase. 



