RECORD: Darwin, C. R. n.d. Abstract of Table of thoroughbred mares. CUL-DAR193.82. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Transcribed by Christine Chua and John van Wyhe, edited by John van Wyhe 8.2022. RN2
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 volume CUL-DAR193 contains notes for Darwin's book Variation under domestication (1865-75).
[82]
Produce table of Throughbred mares put to Thoroughbred Horses extracted from the Racing Calendar
Difference Colts Fillies Barren mares
Foaled in 1846 24 X 485 461 330
1847 7 X 442 435 not stated
1848 15 400 415 "
1849 no returns
1850 1 386 387 "
1851 37 432 469 "
1852 10 491 501 "
1853 25 X 483 458 "
1854 29 X 511 482 "
1855 6 X 512 506 "
1856 43 X 647 604 "
←
1857 5 X 634 629 -514 Barren or slipped their foals
1858 25 X 703 678 512 "
1859 4 681 677 626 "
1860 25 X 736 711 -Above 600 "
1861 13 X 704 691 -498 Barren 73 slipped
1862 37 681 744 499 " 65 "
1863 25 X 733 708 523 " 73 "
1864 47 746 793 522 " 90 "
1865 19 711 730 536 " 134 "
1866 7 809 816 651 " 92 " 651 [+] 92 [=] 743
1867 66 836 902 626 68"
12763 12797 [626 +] 68 [=] 794
[12763 +] 12797 [=] 25560
Keep for Domestic Animal— to show sterility of these highly nurtured & closely interbred quadrupeds —
(21 Years)
12 years males in excess— 9 female in excess.
see what year greatest difference & what average difference
W. B. Tegetmeir Esqr
Effects of Breeding in & in
Darwin cited this information from Tegetmeier in Descent 1: 303n.
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 13 January, 2026