

280 



BOTANICAL GAZETTE 



[APRIL 





The records were made immediately on first opening the doors 

 to the ovens or other compartments, two observers working to- 



gether. 



During 



the time observations were being made, the 



temperatures as well as the humidity dropped, but the hygrother- 

 mograph charts show that under the high temperatures prevailing 

 in the large oven, normal conditions were restored in 30 minutes 

 to 2 hours as regards temperature, and in 1 to 2 hours as regards 

 humidity. In the locker with lot 7, with air temperature normal, 



TABLE III 

 Humidity records during storage tests 



Date 



September 



Time 



2 



• • 



3 

 6 



1 • • 



• 4 « 



7- 



¥ * • 



9 



f - • 



10 



F * t 



14- 

 16. 



► 9 • 



19. 



► • V 



20. 



• m 



21. 



m m 



23 



• ■ 



Ii:iO A.M. 

 3:00 P.M. 



9-45 A.M. 



9:00 A.M. 



I2IIS P -M. 



3H5 P.M. 



12:00 Noon 



12:15 P.M. 



1:45 *-M. 



11:45 AM - 



11:45 A.M. 

 9:45 A.M. 



Average. . 

 Maximum 

 Minimum. 



Percentage of relative humidity of lots 



IOO 

 IOO 

 IOO 

 IOO 

 IOO 



IOO 

 IOO 



• * 



* - 



* * 



• • 



IOO 

 IOO 

 IOO 



IOO 

 IOO 

 IOO 

 IOO 

 IOO 

 IOO 

 IOO 

 IOO 

 IOO 



92.0 



89.0 



88.0 



82.5 

 83.0 



94.0 



930 

 89.0 



100.0 



98.0 



93 -o 



IOO 

 IOO 

 IOO 



•;• 



■7 

 100.0 



82.5 



7 



82.0 

 84.0 



92.0 



96.0 



91 .0 

 96.0 



98.0 



97.0 



8* 



91.7 

 98.0 



82.0 



69.0 



68.0 

 730 



69.0 

 67.0 



73 -o 

 69.0 



70.0 



72.0 



73o 

 68.0 



68.0 



70.0 



73° 

 67.0 



* Humidity with lot 8 in cold storage remained quite uniform, rising to the maximum and dropping 

 to the minimum with each run of the compressor about every 3 hours. 



high humidity was restored in 4 to 10 hours after closing the door. 

 In no case, however, did the humidity drop below 90 per cent and 

 remain there for more than one hour. The slow rise from 95 to 

 100 per cent, or to saturation, required the longest time. 



The observations on humidity are shown in table III. Lot 4 

 ranged about 60 per cent humidity; lot 5 ranged well below 50 

 per cent ; 



from 



Lots 



1 and 2 are indicated as having always been in a saturated at- 

 mosphere. This was assumed from the fact that every time the 

 door was opened to take readings, the walls, top, and bottom of 



