16 
BTLLETIX 1063, V. S. DEPARTMENT OF AGRICULTURE. 
the temperatures in the bins and of the air recorded by the 
instruments and averaged by 2-hour periods for the years 1918-19 
and 1919-20. respectively. The variety used was the Southern 
Queen, and the bin contained about 75 bushels each year. The 
average temperature in the bins was somewhat higher than that of 
the air, and the fluctuations in temperature were less marked in 
M> 
1919 - 1920 
PERIODS OF SEVE.N DAYS EACH 
WEEKLY AVERAGES 
ecu 
■i 
'f 
« 
V 
V 
\ 
\ 
ft 
'\" v 
A 
*V 
b 
P 
V 1 vZ 
— ' J, 
mN 
H v 
' K 
v 
V 
V ' 
* 
A V 
1 f v 
D 
A!L> 
AV 
ERM 
E3 
If I 
f 
WEDNESDAY THURSDAY 
THERMOGRAPH SHEET FOR PERIOD A' 8 
Fig. 4. — Diagrams showing the temperature in the interior of the bins (solid lines) as 
compared to the temperature of the air (broken lines) in 1919-20 at the Arlington 
Experimental Farm. Va. The upper diagram gives the average temperature for the 
storage season, by weekly periods. The middle diagram gives the same data by daily 
averages. In these diagrams each square indicates a period of seven days. The lower 
diagram is a typical thermograph sheet, in this case for the period A'— B'. 
the bins than in the air. Some work was done in studying the 
temperature of the bins as compared with that of standard bushel 
crates, but owing to its incompleteness the results are not presented 
here. In general, the temperature in the crates was about the same 
as that of the surrounding air and somewhat lower than the tem- 
perature of the interior of the bins. 
