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Start Over You searched for: Subjects Insecticides Remove constraint Subjects: Insecticides Publication Year 1800 to 1899 Remove constraint Publication Year: <span class="from" data-blrl-begin="1800">1800</span> to <span class="to" data-blrl-end="1899">1899</span>

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2. Observations on the fertilization of yucca and on structural and anatomical peculiarities in Pronura and Prodoxus: The hibernation of aletia xylina (say), in the United States a settled fact ; Emulsions of petroleum and their value as insecticides