• Darwin Archive | 'Cross and self fertilisation': portfolios, 1840s-1876 | 'Cross and self fertilisation': experimental results, continued | Experimental results, continued: 'Original measurement of crossed & self fertilised plants' | Verbascum thapsi [comparison of crossed and self-fertile plants in height, weight], 1867-01-01 - 1868-12-31 | Verbascum thapsi [comparison of crossed and self-fertile plants in height, weight], 1867-01-01 - 1868-12-31

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