Difficiles nugae: or, observations touching the Torricellian experiment, and the various solutions of the same, especially touching the weight and elasticity of the air / [Anon].

Matthew Hale

Date:: 1674

Credit: Difficiles nugae: or, observations touching the Torricellian experiment, and the various solutions of the same, especially touching the weight and elasticity of the air / [Anon]. Source: Wellcome Collection.

296/328 page 282

$a neste. tala weapon eB ne legit tiginad Govinn praia . : es . 2 7 ae ~ ag nti AARC McEneney MEE ape TEM Thy BRT 5 ~~ oe a ae a _ “ pe ee ee ee: POST PENN AS es, Bey #78 eae 3 ap I SOLE TS BINT, EE CATS AE ST Lae ne ae :| SS SS eee es “ wy 282 WMbferbationS touching the xvhen the Hemifpheres were ‘firft hea- } ced, and clapt together, and thereby | when they became celd, cohered excee- firy ding ftrongly ; yet when they were un- J der that ffrong cohefion, that they J would fuftain a confiderable weight as _ before, without parting afunder, yet if | afterwards they were brought but to a Bp,/ moderate heat, either by a arene % difh g of Coals‘put under them, or by holding pict them neegthe fire, they woul faddenly § Bio fall afunder'of themfelves, without any Ai. weight appended tofeverthem. © §] , The - reafon whereof is a need Boon namely that by the heating of the He- Bini, mifpheresthe included Air is again ex- Bp), panded, andits tenfion laxed, and the : filaments thereof which ‘were’ before Bj), under a’tenfion and contraétion by:the Fe Air, ftriving to gain its: ‘natural tempe- J jy, rament, are now let doofe) as a Lute- J the {tring is let down by. the unferewine of yi. the Pins. And confequently the fuction and attraétion of the Air-upon ‘the con: | cave Superficies of the Hemifpheres 5 § ,. which before held them together, is re- 9 ,,; Jaxed and’ difcharged,$