Mr. Hennessey on Rainfall in relation to Changes of Moon. 545 



close the Table, on the chance of its proving sufficiently interesting to 

 be noticed. 



Average daily fall of rain between successive quarters and at each 

 quarter of the moon from 1st of May to 31st of October of each 

 year, measured at the Office of the Superintendent of the Great 

 Trigonometrical Survey of India. The office stands in Mussoorie, 

 on the most southern range of the Himalaya Mountains, lat. N. 

 30° 28', long. E. of Greenwich 78° V ; height above mean sea- 

 level G500 feet. 



Tear. 



Ayerage Daily Fall. 



Total Fall 

 from May 

 1 to Oc- 

 tober 31. 



) to® 



• 



• to 3 



D 



D too 



O 



O to ) 



> 



1854 



1855 



1856 



1857 



1858 



1859 



1860 



1861 



1862 



1863 



1864 



1865 



1866 



inch. 



•644 

 •456 

 •732 

 •280 

 •402 

 •665 

 •356 

 ■685 

 •611 

 •348 

 •762 

 •543 

 •135 



inch. 



•374 

 •204 

 •745 

 •319 

 •448 

 •263 

 •228 

 ■678 

 •620 

 •342 

 •409 

 •235 

 •360 



inch. 



•813 

 •360 

 •703 

 •794 

 •485 

 •253 

 •430 

 1-014 

 •513 

 •862 

 •545 

 •276 

 •402 



inch. 



•176 

 •918 

 •237 

 1-013 

 •298 

 •642 

 •719 

 •372 

 •651 

 •932 

 •292 

 •120 

 •580 



inch. 



•630 

 •311 

 •397 

 •521 

 •518 

 •306 

 •564 

 1-332 

 •364 

 •511 

 •394 

 •443 

 •636 



inch. 



•096 

 •356 

 •588 

 •136 

 •157 

 •253 

 •205 

 •287 

 •852 

 •595 

 •328 

 •526 

 •809 



i 



ach. 

 512 

 •753 

 347 

 368 

 705 

 570 

 301 

 577 

 645 

 291 

 237 

 518 

 452 



inch. 



•621 

 •733 

 •340 

 •606 

 •373 

 •583 

 •073 

 •855 

 •530 

 •546 

 •352 

 •785 

 •483 



inches. 



100-72 

 85-85 

 93-28 

 88-27 

 84-61 

 78-31 

 6581 



141-16 

 93-91 

 93-03 

 82-19 

 7637 

 81-15 



Means of 1 

 columns J 



•509 



; -402 



•573 



•535 



•533 



•399 



•483 



•529 



89-589 



Grenei'al mean of ® D o ) 0-466 inch. 



General mean of ) to ®, ® to D , J) to o> O to ) 0525 „ 



Note. — The rainfall during the preceding twenty-four hours was 

 measured daily at mean noon. Suppose m v m 2 , m. A , m x , m 5 , m G , m 7 , m s , 

 m g to denote nine such consecutive measurements of daily rainfall, 

 registered at Mussoorie mean noon, respectively on the 1st, 2nd 

 . . . 9th of the month, and that the moon entered her first quarter 

 at an hour nearer to noon of the 1st than to the preceding or suc- 

 ceeding noons. In this case the arithmetical mean of m x and m 2 has 

 been entered in column ]) as the average daily fall at the first 

 quarter. Similarly, if full moon occurred nearest to noon of the 8th, 



1)1 -f- TYl 



the quantity -~ — 9 has been reckoned as the average daily fall at 



C 11 j wi. + si.+w. + w +w 7 l ^ 7 . 7 



lull moon ; and — - r 2 represents the average daily 



D 



fall from ]) to Q. The foregoing Table has been prepared under 

 these conditions by Baboo Dwarkanath Dutt, Computer to the 

 Great Trigonometrical Survey of India. 



