The Technical World Magazine, Volume 20Technical World Company, 1912 |
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Page 78
... natural enemy of the white fly was arrived at only after field tests and spraying experiments for its control had failed . Then it was remembered that success had been attained by intro- ducing a small lady beetle , the natural enemy of ...
... natural enemy of the white fly was arrived at only after field tests and spraying experiments for its control had failed . Then it was remembered that success had been attained by intro- ducing a small lady beetle , the natural enemy of ...
Page 90
... Natural History in New York a great African Hall . Half a million dollars is being spent upon it . It will also be the first natural history exhibition in which every specimen will prac- tically defy the ravages of time and climate ...
... Natural History in New York a great African Hall . Half a million dollars is being spent upon it . It will also be the first natural history exhibition in which every specimen will prac- tically defy the ravages of time and climate ...
Page 388
... NATURAL PARKS ARE BEST THE superiority of the natural park over the artificial park is readily apparent in the fine system of parks in the city of Seattle . No city in the country can boast of as many natural parks as Seattle . But ...
... NATURAL PARKS ARE BEST THE superiority of the natural park over the artificial park is readily apparent in the fine system of parks in the city of Seattle . No city in the country can boast of as many natural parks as Seattle . But ...
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