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page 28 note 1 Poiss. Foss. tome iii. tab. la, fig. 9–11.
page 28 note 2 Op. cit. tome iii. tab. 5, flg. 1–3.
page 28 note 3 Revised abstract of paper read at the British Association.
page 30 note 1 Reprinted from the “Canadian Record of Science.”