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Gelifiant preactive a base d'argile organophile pour graisses lubrifiantes, graisse lubrifiante epaissie par un gelifiant preactive a base d'argile organophile et procede de preparation des gelifiants preactives a base d'argile
LXVIII. Observations on the dichotomous distribution of animals: together with a binary arrangement of the natural order Saxifrageæ: To the editor of the Philosophical Magazine and Journal