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Mary D. Leakey: Olduvai Gorge, vol. 3: excavations in Beds I and II, 1960–1963. Cambridge: University Press, 1971. 306 pp., 41 pls., 121 figs.£ 10• 00.
Arithmetic in the Plainest and Most Concise Methods Hitherto Extant: With New Improvements for Dispatch of Business in All the Several Rules. As Also Fractions, Vulgar and Decimal, Wrought Together After a New Method...
IV. A letter from Mr. Leeuwenhoeck, FRS concerning the muscular fibres in several animals, and the magnetick quality acquired by iron, upon standing for a long time in the same posture