Inorganic Plant Poisons and Stimulants

by Winifred Elsie Brenchley

[ [2] Vide [Daubeny, Journ. Chem. Soc. (1862), p. 210].

[ [3] These are “grains of Paradise,” Guinea grains, or meleguetta pepper. They are the seeds of Amomum melegueta and A. Granum-Paradisi, N.O. Zingiberaceae.

[ [4] The English translation in Just’s Bot. Jahresber. speaks only of a “solution of copper,” and in no case is the specific compound mentioned.

[ [5] 44 mg. ZnSO₄ . 7H₂O = 10 mg. Zn = 1/22,727 ZnSO₄ . 7H₂O approx.

[ [6] This is equivalent to about ·1% of poison.

[ [7] m probably = gram molecular weight.

[ [8] 0^{µ gr.}, 1 = 0·0001 mg.

[ [9] 30 grams arsenious acid to 30·7 “cubik Decimeter” soil = about ·1%.

[ [10] In the present state of our knowledge such a concentration seems relatively strong!

[ [11] The exact compound is not specified in the abstracted paper, ¹⁄₁₀₀₀–¹⁄₁₀₀% Natr. Ars. being given.