• Darwin Archive | 'Insectivorous plants': portfolios, 1860 - 1876 | Experimental treatments and observations, 1860-1862, 1871-1872 | Drosera / Placed sharp needle under Leaves so as to touch under surface of viscid drops & it drew it not [application of yolk of egg, boiled lard, boiled blotting paper, carbonate of ammonia, sulphate of ammonia, sulphate of magnesia, nitrate of potassium, phosphate of sodium, alum, salt, boiling water, tartrate of ammonia, ammonium chloride, carbonate of potassium, carbonate of sodium, nitrate of ammonia], 1872-08-23 - 1872-09-10 | Drosera, 1872-08-23 - 1872-09-10

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