...Freshly dried cottonmouth venom tested on young white rats showed the lethal dose to be from 23 to 29 milligrams per kilogram of body weight...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...36 milligrams per kilogram for copperheads...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...I have gathered on a pine-tree a nest of the Mason-bee of the Shrubs that weighed a kilogram (2...
J. Henri Fabre 「Bramble-bees and Others」
...; 5 kilograms = 11lb...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
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