8 
BULLETIN 35, U. S. DEPARTMENT OF AGRICULTURE. 
The dates given in this table are not absolute; they are approxi- 
mate averages made from many observations during three or four 
seasons and are meant to indicate the behavior of the different vari- 
eties in cold storage when handled with sufficient care to insure their 
being packed in sound condition. There is always wide variation 
between different seasons and frequently between different packages 
during the same season. This diversity is likely to be more pro- 
nounced when the fruit is packed under ordinary commercial con- 
ditions than is the case when the handling is done with extreme care 
under experimental conditions. 
MOST FAVORABLE TEMPERATURE FOR GRAPE STORAGE. 
Grapes used in the experimental storage tests were held in common 
storage at temperatures ranging from 55° to 60° F. and in cold stor- 
age at 38° and 32° F. Tables VI and VII give the results of the 
storage temperature tests, the data being presented in terms of the 
number of days elapsing before 5 per cent, 10 per cent, and 15 per 
cent of total deterioration developed. Comparable experimental 
series were used each season and the figures presented give a fair 
indication of the influence of the storage temperature upon the length 
of time that the grapes will remain in good condition. Table VI 
clearly shows the limitations of common storage as compared with 
cold storage at 32° F., for under the latter conditions nearly four 
times as many days elapsed before the development of 5 per cent of 
deterioration, while the 10 per cent period was not reached until three 
times as many days had passed, and the 15 per cent period almost 
three times as many. 
Table VI.— Comparison of storage temperatures for table grapes showing the 
number of days the grapes were held in common storage (from 55° to 60° F.) 
and cold storage (32° F.) before 5 per cent, 10 per cent, and 15 per cent of 
deterioration appeared during the season of 190S. % 
Packing. 
Kind of storage and percentage of deterioration. 
Variety. 
Common storage 
(55° to 60° F.). 
Cold storage 
(32° 1'.). 
5 
per 
cent. 
10 
per 
cent. 
15 
per 
cent. 
5 
per 
cent. 
10 
per 
cent. 
15 
per 
cent. 
Cork, granulated 
Days. 
33 
40 
46 
21 
10 
26 
' 14 
23 
12 
12 
15 
17 
10 
1.5 
15 
17 
Days. 
43 
55 
. 62 
29 
18 
34 
43 
30 
19 
19 
19 
21 
17 
21 
31 
28 
Days. 
50 
64 
72 
34 
25 
39 
46 
35 
24 
24 
.21 
25 
21 
25 
45 
35 
Days. 
105 
118 
157 
55 
65 
65 
75 
63 
72 
57 
42 
77 
29 
68 
78 
45 
Days. 
119 
135 
190 
69 
75 
74 
94. 
69 
84 
64 
52 
87 
41 
84 
92 
68 
Dai/s. 
128 
Do 
1-16 
Do 
Redwood sawdust 
212 
Cork, granulated 
77 
do 
82 
Do 
80 
Do 
. 105 
75 
Do 
91 
Flame Tokay 
Do 
Do 
70 
Cork, line granulated 
58 
96 
Do 
48 
Verdal 
93 
Do 
102 
Do 
83 
