966 resultados para Duncombe, Thomas Slingsby, 1796-1861


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I. Introduction and books I, II.--II. Books III-IX.--III. Books X-XIII and appendix.

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"Mit Vergleichung der Eisenhüttenindustrien in Britannien, Belgien, Frankreich, Schweden u.s.w., nach amtlichen und andern sichern Quellen."

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Lun yu ge jie -- Nan Han shu -- Nan Han shu kao yi -- Nan Han shu cong lu -- Nan Han wen zi lue -- Jin shi cheng li -- Xu jin shi cheng li -- Bei wen zhai qi -- Shu yu -- Qu hua.

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Double leaves, oriental style, in case.

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v. 1. Dissertation: exhibiting the progress of metaphysical, ethical, and political philosophy, since the revival of letters in Europe. 1854.--v. 2-4. Elements of the philosophy of the human mind ... To which is prefixed introduction and part first of the Outlines of moral philosophy. 1854.--v. 5. Philosophical essays. 1855.--v. 6-7. The philosophy of the active and moral powers of man ... To which is prefixed part second of the Outlines of moral philosophy. 1855.--v. 8-9. Lectures on political economy ... To which is prefixed part third of the Outlines of moral philosophy. 1855.56.--v. 10. Biographical memoirs of Adam Smith, William Robertson, Thomas Reid. To which is prefixed a Memoir of Dugald Stewart, with selections from his correspondence. By J. Veitch. 1858.--v. 11. Translations of the passages in foreign languages contained in the collected works of Dugald Stewart. With general index. 1860.

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Mode of access: Internet.

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Searching and handling time of Chrysoperla externa (Hagen, 1861) (Neuroptera, Chrysopidae) larvae fed on Uroleucon ambrosiae (Thomas, 1878) (Hemiptera, Aphididae). The objective of this research was to determine the searching and handling times of three larval instars of C. externa fed on U. ambrosiae at densities of 30, 40 and 50 per vial, with the feeding of the larvae at the preceding instars being U. ambrosiae nymphs or Sitotroga cerealella (Olivier, 1819) eggs. The larvae were maintained at 25 ± 2 ºC, 70 ± 10% RH and a 14-h photophase. A completely randomized design in a 6 x 3 factorial scheme with 12 replicates was adopted. The shortest searching time was found for the 2nd and 3rd instar larvae of C. externa, and this parameter was variable depending on the feeding given to the larvae previously. The handling time was similar for the 1st, 2nd and 3rd instar larvae. The longest searching time was found at an aphid density of 30, as compared to densities of 40 and 50 prey, with which there were no significant differences. Prey density did not have any influence on handling time.

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Feeding potential of Chrysoperla externa (Hagen) (Neuroptera, Chrysopidae) in different densities of Uroleucon ambrosiae (Thomas) (Hemiptera, Aphididae). The feeding potential of 2nd and 3rd instar larvae of Chrysoperla externa (Hagen, 1861) in relation to different densities of 30, 40 and 50 nymphs of Uroleucon ambrosiae (Thomas, 1878) at 3rd and 4th instars was evaluated. The treatments were individualized into 2.5 cm in diameter and 8.5 cm tall flat bottom glass vials and maintained in a controlled environmental chamber at 25±2 ºC temperature, 70±10% RH and 14 h photophase. A completely randomized experimental design with 10 replications was used. The consumption of the prey nymphs by the predator larvae was evaluated after 1, 2, 4, 8, 16 and 24 h from the beginning of the experiment and at every subsequent 24 h period until 2nd instar larvae molted or 3rd instar larvae pupated. Results have shown that for 2nd instar larvae, during the 1 h to 24 h period, there was a decreasing prey consumption at the 30 and 40 prey densities. However an increase in the consumption at the 50 prey density was observed. After this period, C. externa larvae presented a progressive increase on nymphs consumption as a function of the prey density. The same occurred with de 3rd instar predator larvae in all treatments. When daily mean consumption was evaluated the predator/prey ratio was 1:23, 1:27 and 1:33 for 2nd instar larvae and 1:27, 1:33 and 1:41 for 3rd instar larvae at 30, 40 and 50 nymph densities, respectively.