Aids to the mathematics of hygiene / [Robert Bruce Ferguson].

  • Ferguson, R. Bruce (Robert Bruce)
Date:
1904
Catalogue details

Licence: In copyright

Credit: Aids to the mathematics of hygiene / [Robert Bruce Ferguson]. Source: Wellcome Collection.

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    £ that is, d- = 104-39 ; \ log d= log 104-39 = 2-0186589; .. log d= i-z = 0-8074636=/^ 6-4 ; <26=6-4 feet. [No deduction has been made for loss by evaporation.] Example .- How much water will 1 inch of rain deliver on 1 acre of ground ? One inch (or ~ foot) of rain over 1 square yard (or 9 square feet) will give I 7 9 x — =- cubic foot of water ; 124 = ^ x 6-23 = 4-6725 gallons. One acre will give 4,840x4-6725 = 22,615 gallons, = 22,615 x 10 = 226,150 pounds ; 226,150 , , . = ^24^ = I01 ton-s (nearly). [1 acre = 4,840 square yards. 1 cubic foot = 6-23 gallons. 1 gallon = 10 pounds. 2,240 pounds = 1 ton.] EXCRETA. Example: How much solid and liquid excreta are passed by an average adult man per diem, and how much water- free solids does the amount represent? How much