Royal Society. loi 
as to aflure him, that he erred no more in the quantity of rain of 
another year, than by the miftake in the differences of the parts 
of a pound in the firil and lafl obfervationvS 5 whereas fliould he 
Hill write down the rain that falls between two obfervations, he 
might be lubjeiSl: to make as great a miftake in every one of them, 
and conlequently be much more uncertam of the quantity of rain 
fallen in many of thofe added together 5 belides, this addition is 
longer in performing and giving the quantity fought, than the 
method he made ule of^ and he fubjoined the following parti> 
culars to fhew how little trouble there is in this taik. 
Obfervations of the rain falling 
monthly for 1 5 years 
11677 
78 79 80 
8ij 82 
831 84 
85 86 
Sum 
\Jan, 
472 
371 
43, 512 
53J 986 
238 
32 
no 472 
328Q 
Feb, 
27c 
371 
i6i 492 
363 
135 
245 
483 
42; 20 
2582 
March 
24*; 
250, 202 413 
235 
237 
305 
«7 
185! 572 
2731 
April 
32'; 
170' 92 222 
57 
308 
402 
370 
380,1 305 
2631 
May 
3^3 
581! 105 188 
69 
315 
353 
97 
20lj 437 
265c 
'June 
916 
2571 298} 342 
397 
S^7 
4b8 
192 
410; 473 
38-c 
July 
3f;i 
339, 350 
302 
292 
482 
412 
3^3 
4971 188 
3526 
Aug, 
48^ 
1451 835 
502 
425 
3^5 
582 
338 
3981 870 496d 
\Sep. 
223 
P7| 5S3 
146 
607 
293 
152 
199 
163! 572 
3435 
oa. 
333 
6441 616 
57c 
170 
427 
330 
425 
325, 293 
4vr^ 
Nov. 
432 
555 127 
479 
235 
S^ 
192 
579 
522! 709 4355 
Dec. 
400 
57 439 
269 
423 
456 37 
299 
548 132 305 J 
Sum 436514.267,3821 '4428] 
3326 
5066 3716134141 
3781 !^0434.I22' 
1689 
9c 
91 
92 
93 
Sum 
Jan, 
333 
707 
197 
54 
21^ 
1509 
Feb. 
39^ 
171 
112 
168 
922 
March 
875 
H^ 
4-f 
347 
29S 
2136 
April 
468 
7^ 
38t 
498 
539 
1969 
May 
182 
244 
30c 
330 
93 
1 149 
June 
302 
179 
412 
416 
181 
1490 
July 
120 
218 
28^ 
448 
112 
1183 
Aug, 
222 
402 
19^- 
198 
668 
1683 
Sep. 
442 403 
21 r 
605 
641 
2306 
oa. 
740 
7^- 
165 
273 
^514 
2457 
Nov, 
415 
717 
2lC 
148 
r627 
2137 
Dec. 
368 
262 
i6c 
892 
261 
1952 
Sum 
48604291 
314c '372(42301 
20893 
All we can learn from thefe obfervations, is, that here we have 
almoft ji ft twice the quantity of rain that falls at Tarisj but as 
