[45] Naturalist in Mid-Africa.
[46] Naturalist in Mid-Africa.
[47] Floyer.
[48] Drude, Vegetation der Erde.
[49] Drude, l.c.
[50] Rawlinson, Story of Egypt.
[51] Ridley, l.c.; Lindley, l.c.; Maisch, Materia Medica.
[52] This was suggested by Tyndall, but has been denied by others.
[53] Journal Society of Arts, August, 1896.
[54] Heuzé, Les Plantes Industrielles. Most of the following details are obtained from this valuable work.