• Darwin Archive | 'Insectivorous plants': portfolios, 1860 - 1876 | Experimental treatments and observations, 1872 - 1874 | 9 1/2 oz of 10 oz means equal 10 oz as measured by standard, 1809-01-01 - 1882-04-30 | 9 1/2 oz of 10 oz means equal 10 oz as measured by standard, 1809-01-01 - 1882-04-30

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