• Darwin Archive | 'Insectivorous plants': portfolios, 1860 - 1876 | Experimental treatments and observations, 1872 - 1873 | 4 leaves in 2 dr of 3 gr of extract of Hyosciamus to 1 oz of water [application also of phosphate of ammonia], 1873-07-30 | [verso of note, text cut], 1873-07-30

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