Hooke, Robert, 1635-1703 / Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses : with observations and inquiries thereupon
Observ. XV. Of kettering-stone, and of the pores of inanimate bodies, pp. 93-100
Observ. XVI. Of charcoal, or burnt vegetables, pp. 100-106 ff.
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