Scientific American Supplement
November 29, 1919
Some of the articles inside are: The cover shows preparing to dynamite lime quarry; Posture as a factor in the origin of Animal species I; chemical danger signs for the machine operator; mineral wealth of Morocco; The manufacture of lime - 6 photos; A possible limit to gravitation; Insects in their relation to forestry - 6 photos; the static head turn indicator for aeroplanes; German synthetic rubber; Experimental wireless telegraphy and telephony VIII; Heating of underground cables; Coke for domestic heating; ; a number of other articles and photos..
This large issue (12X16") is in excellent condition. The Supplement was similar to the regular Scientific American except the ads were deleted and more photos were included in the larger articles.
Most Scientific Americans in stock 1879-present. Most Supplements in stock 1901 to 1919. Inquire about other issues.
Chosen Reflections/ Million magazines, Kaufman Texas 75142.
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