(837)
Numb. 42.
PHILOSOPHICAL
TRANSACTIONS.
Monday, Decemb. 14. 1668.
The Contents.
The Description of a way, said to be New and Universal, for working Convex Spherical Glasses upon a Plain, for all practicable Lengths, without other Dishes, or concave Moulds.Two Extracts out of the Italian Giornale de Letterati; the one, about two Experiments of the Transfusion of Blood, made in Italy, the other, concerning a Microscope of a New fashion, discovering Animals lesser than any seen hitherto.An Account of two Books;I. A CONTINUATION of NEW EXPERIMENTS Physico-Mechanical, touching the SPRING and WEIGHT of the AIR, and their effects, by the Honorable ROBERT BOYLE, Oxford, 1669 in 4°.II. HYDROLOGIA CHYMICA, &c. by W. SYMPSON. London 1669. in 4°.
The Description
Of a Way, said to be New and Universal for working Convex Spherical Glasses upon a Plain, for all, practicable Lengths, without other Dishes or concave Moulds.
THis Description is found in an Italian Book entitled L'OCCHIALE all' OCCHIO, overo DIOPTRICA PRATTICA del Carlo Ant. MANCINI in Bologna 1660, in 4°, which coming not into these parts, at least not to our knowledg, till now, could not be sooner taken notice of. It treats of Light; of the Refraction of Ray's; of the Eye and the Sight; and also of the considerable Helps that may be afforded to the Eye, to make it
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