Gary Nathan Calkins (18 January 1869 – 4 January 1943) was an American protozoologist and a professor at Columbia University. He wrote several landmark textbooks on the biology of the protozoa. He described conjugation in Paramoecium and in his taxonomic approach separated chlorophyll containing flagellates from other protists. (From Wikipedia)
More about Gary N. Calkins:Books by Gary N. Calkins:
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Calkins, Gary N. (Gary Nathan), 1869-1943: The Phylogenetic Significance of Certain Protozoan Nuclei (reprinted from the Annals of the New York Academy of Sciences, 1898) (page images at HathiTrust)
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Calkins, Gary N. (Gary Nathan), 1869-1943: Biological studies by the pupils of William Thompson Sedgwick. Published in commemoration of the twenty-fifth anniversary of his doctorate. ([Printed at the University of Chicago Press], 1906), also by C.-E. A. Winslow, George Chandler Whipple, Augustus Baldwin Wadsworth, Percy Goldthwait Stiles, Anne F. Rogers, Burt Ransom Rickards, Samuel Cate Prescott, Earle Bernard Phelps, Carl Spencer Milliken, Albert Prescott Matthews, E. E. Lochridge, Marshall Ora Leighton, Arthur I. Kendall, Edwin Oakes Jordan, Daniel Dana Jackson, Theodore Hough, Clara E. Ham, Stephen De Meritte Gage, George Warren Fuller, Harrison G. Dyar, S. Henry Ayers, and W. T. Sedgwick (page images at HathiTrust)- Calkins, Gary N. (Gary Nathan), 1869-1943: Biology (H. Holt and company, 1917) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Biology (H. Holt and company, 1914) (page images at HathiTrust; US access only)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Biology. (H. Holt and co., 1924) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The biology of the Protozoa (Lea & Febiger, 1926) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The biology of the protozoa. (Lea & Febiger, 1933) (page images at HathiTrust; US access only)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Chromatin-reduction and tetrad-formation in Pteridophytes. ([n.p., 1897) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Marine protozoa from Woods Hole. (Govt. Print. Off., 1902) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Marine Protozoa from Woods Hole: Bulletin of the United States Fish Commission 21:415-468, 1901 (Gutenberg ebook)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Mitosis in Noctiluca miliaris and its bearing on the nuclear relations of the Protoza and Metazoa (Privately printed, 1898) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The Protozoa (The Macmillan company;, 1910) (page images at HathiTrust; US access only)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The Protozoa (Macmillan, 1901) (page images at HathiTrust; US access only)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Protozoölogy (Lea & Febiger, 1909) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: Report upon the recent epidemic among brook trout (Salvelenus fortinales) on Long Island. (W.H. Crawford co., 1899) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The smallest living things; life as revealed by the microscope (The University Society, Incorporated, 1935) (page images at HathiTrust)
- Calkins, Gary N. (Gary Nathan), 1869-1943: The smallest living things; life revealed by the microscope (University Society, 1932) (page images at HathiTrust)
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