Cholera in relation to certain physical phenomena : a contribution towards the special enquiry sanctioned by the Right Hon. the Secretaries of State for War and for India / by T.R. Lewis and D.D. Cunningham.

  • Timothy Richards Lewis
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Cholera in relation to certain physical phenomena : a contribution towards the special enquiry sanctioned by the Right Hon. the Secretaries of State for War and for India / by T.R. Lewis and D.D. Cunningham. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    37/146 page 27
    Mean Water-level, 6 years [Inverted curve]. Total monthly Cholera Deaths [38 years]. -i4,-7 from surface. -11 '*5 » - 8'-2 »> Diagram 6.—Average Water-level and Cholera-prevalence in Calcutta. The average water-level for the entire year is 12/,4. The average annual fluctuation in level is 6''4. The following tables show the amount of rise in each year, the amount of fall from one year to another, and the relations of the lowest water-level of each year to one another, taking that of 1870 as zero. Table XXX.—Amount of fluctuation from lowest to highest level in each year from 1870 to 1876. Teab. 1870. 1871. 1872. 1873. 1874. 1875. 1876. Rise in water r-o 8'-2 4'-4 5'-0 6'-8 5'9 7'9 The greatest rise during the period 8’2 occurred in 1871, the second in order 7'9 in 1876. The minimum rise 4'4 occurred in 1872. Table XXXI.—Amount of fluctuation from highest level of one year to lowest level of the next. Yeab. 1870-71. 1871-72. 1872-73. 1873-74. 1874-76. 1875-76. 1876-77. Fall in water-level 6'T 9N0 4'-6 5'Y 6'-0 6’7 7’’4 The greatest fall occurred in 1871-72, the next greatest in 1876-77, that is, the greatest falls succeeded the greatest rises. The least falls also followed the least rises.
    digitised image 1
    digitised image 2
    digitised image 3