432 REPORT—1868. 
Report of the Rainfall Committee for the year 1867-68, consisting 
of J. Guatsuer, F.R.S., Prof. Puituirs, F.R.S., J. F. Bateman, 
F.R.S., R. W. Myune, F.R.S., C. Brooks, F.R.S., T. Hawkstey, 
C.E., and G. J. Symons, Secretary. 
Avoptine the same arrangement as in former Reports, we have first to record 
steady progress with the extraction and classification of published and un- 
published records, and in the examination of rain-gauges. 
The records of the inclined- and tipping-funnelled gauges, described in the 
Report for 1866, and erected at Rotherham under the superintendence and 
at the cost of Mr. Chrimes, have been discussed with some care. One of the 
principal results is the determination of the true angle at which rain fell during 
certain months, and the effect thereof upon the indications of the gauges. 
The following Table shows at a glance the principal results :— 
E 3 Pe $ ll 38 a3 
am SS8lis| Sy | sus 
Per cent. of hori- qi ssels8| so | ea8 
ne Recorded Fall. Satan & 3 Be E #3 E é ae 4 
ef /ee8|22| ee | dee 
$ | Bae aa bs $es 
Hor. | 223° | 45° | 674° | go? aia ah chia 
miles. 
Fans, clr clad seus ntl mene Mistakes sab boo 2 epeaess|* soos 
Feb....! 17688 | 2°250| 2°514| 2-408] 1°767 978°) Tae xT 
March) 1°643] 3°050| 4°012| 5°160] 4°405 68 | 193 | 3°2 
April | 2°464] 3:057| 3:286| 2°842| 2°178 83 | 211 7 
May. .| 2°241 | 2°866| 2°947| 2°676| 17880 go | 166 “9 
June | 1°928| 2'263]| 2°225| 1°790| 17093 ! g2 | 115 8 
July ..| 27184] 2°497| 2°441| 1°920] 1°133 ]114 112 91 | 97 6 
Aug... 3°171| 3°314| 3°033| 2°004] 1°007]}105) 96 97 | 84 2 
Sep....| 17968} 2°057] 1:908| 1'223] °818 105 97 93 | 106 “2 
Oct....| 1°969| 2°314.] 2°254| 1°808| 17136 118 114 3 | 88 | 105 8 
Nov...| “691} °817| °829}) °697| -441]118/120 | 86 | 153 5 
Dee...! 1°353| 2°241| 2°664| 3°027] 2°370 166/197 81 | 164] 18 
Totals 21°300 |26°726 |28°113 |25°555 |18°228 I'o 
which may be thus briefly enumerated. 
1. There is no month in the year in which a gauge whose mouth is hori- 
zontal collects so much as one which is inclined and kept face to wind by a 
vane. 
2. In summer, rain falls nearly vertical, the average angle therewith 
being about 20°, in spring and autumn about 45°, and in winter more 
than 60°. 
3. The ratio of the fall on the ground to that at 25 ft. above it bears a 
nearly constant relation to the angle of fall; for instance, in two months, 
when rain fell at a mean angle of 65° from the vertical, the 25-feet gauge 
collected 25 per cent. less than that on the ground ; and, on the other hand, 
in two months when the mean angle was 20°, the upper and lower gauges 
only differed by 5 per cent. 
4. The relation of these results to their cause-wind is shown in the an- 
