RECORD: Darwin, C. R. n.d. Miquel Corrected Calc / Genera with 4 species & up / Genera with 3 2 & 1 sp[ecies] (calculations). CUL-DAR16.146a-146b. (John van Wyhe ed., 2002-. The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)
REVISION HISTORY: Text prepared and edited by John van Wyhe. 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 volume CUL-DAR16 contains calculations and tables for Darwin's 'big book' Natural Selection F1583.
146a
(Miquel corrected Calc)
Genera with 4 sp & up Genera with 3, 2, & 1 sp
120 common sp. [÷] 622 sp in → [=] .192/1000 (Q) 108 common sp. [÷] 557sp. in → [=] .193/1000 (Q)
228 total common sp [÷] 1179 total sp [=] .193/1000 Q 27 common sp. having vars. [÷] 46 sp. having vars [=] .58 6/1000 Q
1179 [-] 46 — species having vars [=] 1133 228 [-] 27 [=] 201
201 [÷] 1133 [=] 177/1000 177 [x] 3 [=] 531
146b
Miquel, Holland.
Genera with 4 sp. & upwards Genera with 3, 2, 1 sp
22 [÷] 622 [=] 35/1000 Q
25 [÷] 557 [=] 44/1000 (Q)
622sp. in above genera [÷] 120 common sp [=] 5.183
557in above little genera [÷] 108 common sp. [=] 5.157
a little above 1.5th rather more here
about 1/5th
1179 total species [÷] 228 total common sp [=] 5.171
46sp. having vars [÷] 27 Common & varying sp [=] 1.703 below
a little more the 1/5 (5.17) nearly 1/2 (1.7)
Genera with 4 species & upwards Genera with 3, 2 & 1 sp
622 sp. → [÷] 120 common sp. 5.183
557 [÷] 108 common sp. [=] 5.157
Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 5 January, 2026