u 



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Roy. Society of Loudon. Philosoph. Transact. f. 

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— Casey: On a new form of tangential ecjuation. 74 p. — 

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— Proceedings. Vol. VII, No. 3 a. 4 ; Vol. VIII, 

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Vol. XXVI, No. 184; Vol. XXVII, No. 185 



a. 186. London 1877—78. 8». — Williamson: On 

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Batav. Genootsch v. Künsten en Wetenschappen. 

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— Notulen van de algemeene en Bestuurs-Ver- 

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Naturforsch. Gesellsch. in Zürich. Vierteljahrs- 

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