This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...He slowly placed a clean glass rod in front of the head and the insect gave no response. He then repeated the operation with a glass rod dipped in carbolic acid. When this was 4 inches away the insect was much affected, it lifted and moved its head in different directions and made quick forward movements with ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...He slowly placed a clean glass rod in front of the head and the insect gave no response. He then repeated the operation with a glass rod dipped in carbolic acid. When this was 4 inches away the insect was much affected, it lifted and moved its head in different directions and made quick forward movements with its antennae. When the glass rod was brought nearer it moved away quickly and drew its antennae through its mouth. The reaction to turpentine and acetic acid was more violent. Next he cut off the antennae. On the second day after the operation he repeated the experiments, but the insects failed to respond to any one of these three strong odors. After the operation the beetles ate with a greater appetite and some of them lived more than two months thereafter. From these experiments he concludes that the beetles lost the olfactory sense by the removal of the antennae. Experiments with species of several other genera gave the same results but those with beetles of the genera Carabus, Melolontha, and Silpha were less satisfactory. These never completely failed to respond to strong-smelling substances. If they are exposed for a long time to the odors the insects deprived of their antennas become restless and walk away from the glass rod, yet all the movements are less energetic. The entire reaction is indefinite and weakened. Experiments with Hemiptera gave a still less favorable result. After the loss of the antennas these insects reacted almost as well as they did with their antennas intact. Hauser performed the following experiments to ascertain the value of the antennae in the search for food. He placed beetles (Silpha) in a large box whose bottom was covered with moss. In one corner of the box he put a small glass with a small opening, the...
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Add this copy of The Olfactory Sense of Insects, Volume 63 to cart. $37.36, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2012 by Nabu Press.
