RECORD: Darwin, C. R. n.d. Abstract of Newport, On the impregnation of the ovum in the amphibia. CUL-DAR77.93. Edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 2.2023. RN1
NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. The volumes CUL-DAR 76-79 contain material for Darwin's book Cross and self fertilisation (1876).
Newport, George. 1853. On the impregnation of the ovum in the amphibia. (Second series, revised.) And on the direct agency of the spermatozoon. Philosophical Transactions of the Royal Society of London 143, issue 143 (December): 233-90.
[93]
Newport in Phil. Transact. 1853 Part II. p. 253, 256, 258 — on excess of spermatozoa stopping development of egg of Batrachians— shows this clearly get gives reference to same result by Spallanzani & Quatrefages on other animals, & how they accounted for it — Newport believes or suspects in part, owing to gelatinous covering being so thickly studded with spermatozoa that respiration checked. I can hardly believe this, considering their minuteness. —
[Cross and self fertilisation, p. 24: "After having acted in this manner during two seasons, I remembered that Gärtner thought, though without any direct evidence, that an excess of pollen was perhaps injurious; and it has been proved by Spallanzani, Quatrefages, and Newport,† that with various animals an excess of the seminal fluid entirely prevents fertilisation."]
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 29 May, 2023