Malpighi, who affirmed that the body of the chick is to be seen in the egg before the punctum sanguineum makes it appearance.
The views of Malpighi were warmly welcomed on philosophical grounds by Leibnitz, 4 who found in them a support to his 1 The Exercitationes de generatione animalium, which Dr George Ent extracted from him and published in 1651.
The Englishman Grew and the Italian Malpighi almost simultaneously published ifiustrated works on the subject, in which they described, for the most part very accurately, what they saw with the new instruments.
Malpighi ~fl 1679 gave excellent figures and accounts of leaf-roUing and gall insects, and Grew in 1682 equally good descriptions of a leafmining caterpillar.
It is sufficient to note here that cells were first of all discovered in various vegetable tissues by Robert Hooke in 1665 (Micrographia); Malpighi and Grew (1674-1682) gave the first clear indications of the importance of cells in the building up of plant tissues, but it was not until the beginning of the 19th century that any insight into the real nature of the cell and its functions was obtained.
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