The Technical World Magazine, Volume 15Technical World Company, 1911 |
From inside the book
Results 11-15 of 82
Page 163
... natural life . To a husky young man , shoveling twenty tons of coal a day may not sound like a terrific undertaking ; but that is because he fails to appreciate the differ- ence between shoveling that quantity in the course of a ten ...
... natural life . To a husky young man , shoveling twenty tons of coal a day may not sound like a terrific undertaking ; but that is because he fails to appreciate the differ- ence between shoveling that quantity in the course of a ten ...
Page 171
... natural under the circum- stances , would be altogether wrong . The " Bug House " is the name commonly applied to the California State Insectary at Sacramento ; and the methods de- scribed are those employed by the field agents of the ...
... natural under the circum- stances , would be altogether wrong . The " Bug House " is the name commonly applied to the California State Insectary at Sacramento ; and the methods de- scribed are those employed by the field agents of the ...
Page 172
... natural checks that will render these makeshift expedients un- necessary . Never since men began to practice agriculture and horticulture have mechanical means brought under permanent subjection and control a single pest of this nature ...
... natural checks that will render these makeshift expedients un- necessary . Never since men began to practice agriculture and horticulture have mechanical means brought under permanent subjection and control a single pest of this nature ...
Page 173
... natural checks upon the endless number and variety of forms of life , a fairly even balance is main- tained . But man , in providing for the wants of a complex and highly artificial civilization serious- ly disturbs this nat- tural ...
... natural checks upon the endless number and variety of forms of life , a fairly even balance is main- tained . But man , in providing for the wants of a complex and highly artificial civilization serious- ly disturbs this nat- tural ...
Page 174
... natural foe of the cottony cushion scale in the l'edalia cardinalis , a beautiful little red and black ladybird ; collected it in quantities , and forwarded it to California , where it was distributed wherever the pest had made its ...
... natural foe of the cottony cushion scale in the l'edalia cardinalis , a beautiful little red and black ladybird ; collected it in quantities , and forwarded it to California , where it was distributed wherever the pest had made its ...
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