Fr. Rogeri Bacon opera quaedam hactenus inedita. Vol. I containing I. Opus tertium. II. Opus minus. III. Compendium philosophiae

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Longman, Green, Longman and Roberts, 1859 - 573 Seiten
 

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Seite lxxvi - Without mathematical instruments no science can be mastered," he complains afterwards, "and these instruments are not to be found among the Latins, nor could they be made for two or three hundred pounds. Besides, better tables are indispensably necessary, tables on which the motions of the heavens are certified from the beginning to the end of the world without daily labour, but these tables are worth a king's ransom and could not be made without a vast expense.

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