372 
ME. C. CHAMBEES ON THE SOLAE YAEIATIONS OE 
Table VII. — Showing, for the period 1859 to 1865, the aggregates of Easterly and 
of Westerly disturbance in each month of the year, the corresponding ratios to 
the average aggregate monthly disturbance, and the numbers of observations sepa- 
rated as disturbed in each month. 
Easterly Disturbances. 
Westerly Disturbances. 
Easterly and Westerly Disturbances. 
Months. 
Numbers of 
Numbers of 
Numbers of 
Aggregates. 
Ratios. 
disturbed 
observations. 
Aggregates. 
Ratios. 
disturbed 
observations. 
Aggregates. 
Ratios. 
disturbed 
observations. 
January 
304-347 
0-84 
155 
198-089 
0-88 
105 
502-436 
0-86 
260 
February ... 
323-306 
089 
165 
150-901 
067 
79 
474-207 
0-81 
244 
March 
465-344 
1-29 
225 
209-485 
0-93 
114 
674-829 
115 
339 
April 
376052 
104 
185 
289-836 
1-29 
153 
665-888 
1-14 
338 
May 
207107 
0-57 
110 
224-211 
1-00 
117 
431-318 
0-74 
227 
June 
264-433 
0-73 
136 
183-258 
0-82 
96 
447-691 
0-76 
232 
July 
428-079 
1-18 
211 
409-885 
1-83 
204 
837964 
1-43 
415 
August 
592-799 
1-64 
270 
288-258 
1-29 
155 
881 057 
1-50 
425 
September ... 
434-502 
1-20 
195 
234-283 
1-04 
127 
668-785 
1-14 
322 
October 
551-198 
1-52 
245 
293-979 
1-61 
151 
845 177 
1-44 
396 
November ... 
144-255 
0-40 
76 
91-034 
0-41 
51 
235-289 
0-40 
127 
December ... 
247 163 
068 
126 
118-117 
0-53 
65 
365-280 
0-62 
191 
Table VIII. — Showing the aggregates of Easterly and of Westerly disturbance in each 
of the years 1859 to 1865, and in the whole seven years, and the ratios of the 
aggregates for the individual years to the average annual aggregate; also the 
numbers of observations separated as disturbed in each year and in the whole period. 
Easterly Disturbances. 
Westerly Disturbances. 
Easterly and Westerly Disturbances. 
Years. 
Numbers of 
Numbers of 
Numbers of 
Aggregates. 
Ratios. 
disturbed 
observations. 
Aggregates. 
Ratios. 
disturbed 
observations. 
Aggregates. 
Ratios. 
disturbed 
observations. 
1859. 
969-214 
1-56 
417 
500-865 
1-30 
255 
1470-079 
1-46 
672 
1860. 
832-297 
1-34 
385 
606-730 
1-58 
300 
1439027 
1-43 
685 
1861*. 
513-573 
0-83 
262 
348-304 
0-91 
189 
861-877 
0-86 
451 
1862. 
790-728 
1-28 
388 
485-518 
1-26 
262 
1276-246 
1-27 
650 
1863. 
416-532 
0-67 
217 
281-627 
0-73 
157 
698-159 
0-70 
374 
1864. 
374-369 
0-60 
198 
214-164 
0-56 
120 
588-533 
0-59 
318 
1865. 
441-872 
0-71 
232 
254-128 
0-66 
134 
696 000 
0-69 
366 
Seven years. 
4338-585 
2099 
2691-336 
1417 
7029-921 
3516 
12. Remarks on the Disturbance-variations . — At nearly all stations whose disturbance- 
diurnal variation curves have been found by the process described above, one or other 
of these curves, either the easterly or the westerly, closely corresponds in shape to a 
general type. The westerly disturbance- diurnal variation curve for Bombay conforms 
to this type, of which the characteristics are, that during about half the day the ordi- 
nates are very small, whilst there is a gradual and regular rise on either side of this 
quiescent period towards a maximum, which occurs near the middle of the remaining 
* The deficiency in the ratios and numbers of observations for the year 1861 is partly accounted for by the 
fact that during an aggregate of thirty-one days in the months of July, August, October, and November the 
instrument was acting irregularly or was under adjustment, and the observations had to be rejected. 
