Comments on WO’s paper on Salvia [Pop. Sci. Rev. 8 (1869): 261–73], which he admires.
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Comments on WO’s paper on Salvia [Pop. Sci. Rev. 8 (1869): 261–73], which he admires.
Thanks him for his excellent observations [on Epipactis?]; would like WED to watch for some large insect visiting the plant.
Because readers have arrived at different answers to the problem of the rate of increase of elephants, CD offers a rule, used by his son George, for calculating the product for any number of generations.
[Letter erroneously dated June.]
WO very gratified by CD’s complimentary remarks on his Salvia article.
Received TW's book and approves simplicity and economy of its method of keeping time by using small fixed telescope to reduce star observations. Disapproves of using 'Dominical Letters.' Suggests using Julian dates.
Please review TW's enclosed new book on civil time-keeping: How to Keep the Clock Right. [JH annotation: Answered 7 July.]
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