Page:Popular Science Monthly Volume 67.djvu/109

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sent to the Royal Society in 1672, and published by the society in Latin, under the titles 'De Formatione Pulli in Ovo' and 'De Ovo Incubato.' The two taken together, are illustrated by twelve plates, containing eighty-six figures, and the twenty—two quarto pages of text are nearly all devoted to descriptions.

His pictures, although not correct in all particulars, represent what he was able to see, and are very remarkable for the age in which they were made, and considering the instruments of observation at his