A correspondent of the “Lancet” (London) offers a new alternative
method of converting degrees Centigrade into degrees Fahrenheit,
which may be found easier to perform mentally than the usual method,
because the factors can be more easily retained in the memory. This
method consists of multiplying the centigrade figures by 2, deducting
one-tenth of the product, and adding 32.
Example (_a_), 30° C.= 86° F.
Method: 30 × 2 = 60. 60 - 6 = 54. 54 + 32 = 86.
Example (_b_), 37° C. = 98.6° F.
Method: 37 × 2 = 74. 74 - 7.4 = 66.6. 66.6 + 32 = 98.6.
Example (_c_), 40° C. = 104° F.
Method: 40 × 2 = 80. 80 - 8 = 72. 72 + 32 = 104.