SECOND REPORT ON YARIOTTS MANURES AT CHISWICK. 153 
jjate. 
Aggregate mean 
temperature. 
Average Range of 
temperature. 
Aggregate 
Rainfall. 
1870 
0 
0 
in. 
11781 
24-19 
0-14 
„ 25- May 1 
332-1 
17-3 
0-13 
May 2—15 
664-6 
2013 
0-40 
„ 16—22 
426-8 
29-6 
000 
„ 23—29 
392-6 
28-0 
0-00 
„ 30— Junes... 
407-2 
2M 
0-49 
408-4 
23-2 
000 
4562 
29-2 
0-15 
„ 20—26 
434-2 
23-1 
0-12 
„ 27— July 3.,, 
4100 
20-6 
0-00 
July 4— 10 
464-9 
22-5 
0-20 
„ 11—17 
455 0 
223 
0-72 
„ 18—31 
938-1 
21-2 
0-93 
It is of course not practicable, except in a general way, to 
draw any deductions as to the relation between the growth of the 
plants at Chiswick and the climatal record kept at G-reenwich. 
The temperature, range, and rainfall, especially the latter, proba- 
bly differed somewhat on every day. Be this as it may, the general 
results during the four months April, May, June, and July cannot 
have been very different at the two places. A reference to the 
diagram and papers before cited will show how extremely small was 
the difference between the two places during forty years. It may, 
then, with something like certainty, be alleged that the temperature 
of April 1870 at Chiswick was lower than the average at first, subse- 
quently higher, aud at the end of the month again below average ; 
in May the average was lower in the beginning of the month, but 
higher towards the end, than the adopted mean. The temperature 
of June and July presented the same characteristics of deficiency 
in the beginning, and slight excess over the average in the latter 
half of the respective months. 
The rainfall was notoriously deficient, considerably less than 
half the average quantity having, in all probability, fallen : there 
was very little in April, still less in May and J une, but rather more 
in July, in which latter month nearly an inch fell on one day. 
It would be very interesting to ascertain whether the 
greater uniformity observable in the growth of the plants in 
the season of 1870, as contrasted with that in the preceding one, 
was due to the more equal conditions of the soil or to climatal 
differences. 
No doubt both causes would be influential in producing the 
