TRANSPORTATION" OF CITRUS FRUIT FROM PORTO RICO 
13 
comparison of the relative value of refrigerated and ventilated holds 
in carrying fruit from Porto Rico. Cold air was circulated over the 
fruit while loading at the different points around the island, which 
tended to prevent the fruit from rising in temperature after it was 
loaded. After the cargo was loaded and the hatches closed, the fruit 
was cooled down as rapidly as possible. 
The average temperature of the fruit on the docks before loading 
was 80° F. The loaded fruit cooled down somewhat before the entire 
cargo was aboard, so that the fruit temperatures when first recorded 
are somewhat lower than the temperatures of the fruit on the docks. 
The average fruit temperature after the fruit was loaded was 73° F. 
and the final reading 54°, a difference of 19 degrees in five days, or an 
average lowering in temperature of 3.8 degrees per day. In the 
average air temperature there was a lowering of 26 degrees, from 
68° to 42° F., in the same time, or 5.2 degrees per day. If the tem- 
perature of the fruit as it came on the ship is taken into considera- 
tion, there is of course more of a lowering in the temperature than 
noted above. 
The extent of rot as determined by an inspection of the fruit car- 
ried under refrigeration and under ventilation is shown in Table 1. 
Table 1. — Deceit/ in oranges and grapefruit under refrigeration, under ventila- 
tion, and on deck on the second trip from Porto Rico to New York 
[The inspection was made on the pier on arrival in New York] 
Number of- 
Decay (per cent) 
Lot No. 
Boxes 
Fruits 
Decayed 
fruits 
Actual 
Average 
Oranges under refrigeration: 
4 
7 
3 
602 
860 
644 
7 
6 
4 
1.2 
.7 
.6 
3, cultivated . . -._ . . - .. .. 
Total 
14 
2,106 
17 
0.8 
2 
1 
3 
416 
200 
526 
5 
4 
38 
1.2 
2.2 
7.2 
5, uncultivated _._ _ .. . ... _ 
Total 
6 
1,142 
47 
4. 1 
Oranges on deck: 
7, cultivated .... ... ... ... 
2 
8 
238 
1,441 
12 
146 
5.0 
10.1 
5.0 
8, nnp.nltiva.tp.fi 
10.1 
Oranges under ventilation: 
9, uncultivated .. . 
3 
502 
137 
27.2 
27.2 
Grapefruit under refrigeration: 
4 
3 
3 
6 
294 
240 
164 
370 
1 



.3 



11, cultivated. .. 
12, cultivated 
13, cultivated ._ 
Total : 
' 16 
1,068 
1 
.09 
14, uncultivated _ _ .. 
2 
150 
2 
1.3 
1.3 
Grapefruit under ventilation: 
4 
4 
288 
270 
1 
2 
.3 
.7 
16, cultivated. .- 
Total 
8 
558 
3 
.5 
It is evident from Table 1 that fruit carries well under refrigera- 
tion. In only one lot of oranges was there more than 2 per cent of 
