> [!cite] BHL link: this entry starts at [page 129](https://www.biodiversitylibrary.org/page/33189600) of TL-2 Vol. IV > Author links: [IPNI](https://www.ipni.org/a/7439-1) LSID 7439-1, [Wikidata](https://www.wikidata.org/wiki/Q913632) QID Q913632 > Support pages: [[Abbreviations|abbreviations]], [[Layout key|layout key]], [[Cite TL-2|cite TL-2]] ### Author Pearl, Raymond (1879-1940), American botanist, entomologist, student of human populations, teacher and editor; Ph.D. Univ. Mich. 1902; instructor in zoology Univ. Michigan 1902-1905, in London 1905-1906, at Univ. Pennsylvania 1906-1907; head dept. biol. Maine Agric. Exp. Station 1907-1918; professor of biometry and vital statistics Johns Hopkins, Baltimore 1918-1925; director Institute of Biological Research ib. 1925-1930; professor of biology ib. 1930-1940; D.Sc. Dartmouth 1919. **Abbreviated name**: *Pearl* \[standard form in IPNI: *Pearl*\] #### Herbarium and types Unknown. Some manuscripts in Smithsonian Archives. #### Bibliography and biography Barnhart 3: 60; CSP 17: 752; Hirsch p. 227; Kew 4: 257; Lenley p. 322; PH 450, 939. #### Biofile - Anon., Genetics 26(1): frontisp., portr. on p. i. 1941 (member editorial board of Genetics 1916-1940; b. 3 Jun 1879, d. 17 Nov 1940); J. Wash. Acad. Sci. 31(3): 127. 1941 (obit.); New York Times 18 Nov 1940. - Gilbert, P., Comp. biogr. lit. deceased entom. 291. 1977. - Greenwood, Major, Nature 147: 140. 1941; Ecology 22: 408. 1941. - Henderson, L.J., Amer. Philos. Soc. Yearb. 1940: 431-433. 1941 (obit.). - Jennings, H.S., Nat. Acad. Sci. Biogr. Mem. 22: 295-347. 1943 (full biogr. and bibl., portr.). - Miner, J.R. & J. Berkson 52: Sci. Mon. 52: 192-194. 1941 (b. 3 Jun 1879, d. 17 Nov 1940, portr., obit.). - Park, T., Dict. Amer. biogr. 22(suppl. 2) 521-522. 1958 (biogr., bibl.). - Reed, L.J., Science ser. 2. 92: 595-597. 1940 (obit.). #### Composite works Founder and editor until his death of *The Quarterly Review of Biology and human Biology* (vol. 1, 1926-x). ### Publications ##### n.7581. Variation and differentiation in Ceratophyllum **Title** *Variation and differentiation in Ceratophyllum*... Washington, D.C; (Published by the Carnegie Institution of Washington) February, 1907. Oct. **Abbreviated title**: *Var. diff. Ceratophyllum*. **Notes** *Co-authors* ("with the assistance of): Olive M. Pepper and Florence J. Hagle. *Publ*.: Feb 1907, p. \[1\]-136, *2 charts. Copies*: BR, MO. – Carnegie Institution of Washington, Pub. no. 58.