Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon / By R. Hooke.

Robert Hooke

Date:: 1665

Credit: Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses. With observations and inquiries thereupon / By R. Hooke. Source: Wellcome Collection.

348/384 page 228

$22% sgsiz surfer &k4x« fnftaind by any part is 35 , r cf thepreflure, and expanfion^ that is, of^tne two J ^ jt f0u0WS, fince that Rettangle or produft of the means, J 5^ ^ultiphcation Gf infinite diverfities of Pr0tUetmthyatbtheheightPof the Air is alfo indefinite; for fince (as far as numbers, thatth<M?e ° n h *:r ceems capable of an indefinite Ex- paSthe preffure may be decreafed in mfimtum, and confequently its expanfion upwards indefinite a^o^^re^ce of denfityj and no Experi- , known to prove a sdm, or ikipping from one degree ofrari- me Y ntler much differing from it, that is, that an upper part of the 7- (knn d fo much differ from that immediately fib],,cot ton, as to Air mould 1 . re nhierve between the Air and \Va- makeidiniB„tftSng more likely, that there is a continual increafe of ter, &c. ^tnoeing , y - ^ hey are removed from the rarity m^^fIthwm hence neceffarily follow, that (as in the coTdnuSand01 bM &°m3*****’“^ nted the reafon of all the above recited Thcenomena con- cernbgfhe appearance of the Celeft.al Bodies, will very eafily be de- duS4 The rednefsof the Sun, Moon, and Stars, will be found to be caufed’by the infleftion of the rayswithinthe^e- Tb*«£ not really in or near t^.lu™nn°e'? ^bfcrvlle’in fevlral places differing mLongitudel^obc;1 atihe fame time different,thefettingandrifingSun of all parts being ^ the colour of the Air interpos'd, gure A BCD, and, haying fill d it with purede t W t^ , lyit the Sun beams then takmg a picccof very a8againftthe againft that fide of the Globe that is oppofite to the sun, & fidc t$