 | John Holmes Agnew, Walter Hilliard Bidwell - 1858 - 924 페이지
...vessels filled with the same fluid : in none of these could I perceive a trace of an insect, nor could I see any in any other part of the room." The experiments were repeated in various ways, and with numerous precautions to prevent the introduction of extraneous matter. Still... | |
 | 1859 - 478 페이지
...examination of numbers of vessels filled with the same fluid. In none of these eonld I pereeive a traee of an inseet, nor eonld I see any in any other part...that were eanstie or absolutely poisonons. Thongh the solid materials employed had been subjeeted to a heat greater than that of molten iron, and the... | |
 | Michigan. State Board of Agriculture - 1871 - 498 페이지
...vessels filled with the same fluid ; in none of these could I perceive the trace of an insect, nor could I see any in any other part of the room." The experiments were repeated in various ways, and with numerous precautions to prevent the introduction of extraneous matter. Still... | |
 | Ohio State Board of Agriculture - 1872 - 660 페이지
...vessels filled with the same fluid; in none of these could I perceive the trace of an insect, nor could I see any in any other part of the room." The experiments were repeated in various ways, and with numerous precantions to prevent the introduction of extraneous matter. Still... | |
 | Henry Allon - 1857 - 596 페이지
...vessels filled with the same fluid: in none of these could I ' perceive a trace of an insect, nor could I see any in any other ' part of the room.' The experiments were repeated in various ways, and with numerous precautions to prevent the introduction of extraneous matter. Still... | |
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... distinctly proved. I next imagined, as others have done, that they might have originated from the water, and consequently made a close examination of numbers of vessels filled with the same fluid : in none of these could I perceive a trace of an insect,... 