Hooke Folio Online

218

Then the minutes of the Last Day meeting were read which gaue
occasion wch. gaue occasion to Discourse further concerning the
nature of the Air and of the vapours Raysd vp into it
by heat.

mr Henshaw Related the ^ /manner of making the/ Experiment of condensing the
said vapours out of the air, by putting Ice and salt
into a glasse and tapered downwards And ending in a point
and then suspending it in some place where a considerable
currant of the air passes by, for By that meanes the
vaporous parts out of the air will be condensd by
the exceeding great cold of the vessell and trickling down by
the sides will Drop into a Receiuer placed vnder neath the taper
ing end . a pretty quantity of water in a little time.
This was confirmd by Dr. croon & others.
mr. Hooke Related an obseruation of the like nature which he
had made in the year 1665 . in a Deep well of one mr. Clark
neer Banstead Downes of 300 foot Deep. Into wch. hauing in
the time of a very great frost & exceeding cold wind wch. hapned then
about Xtmas. Let Down a bottell wth Spt. of wine soe cooled by the
air aboue, the same - when pulld vp againe - appeard all couerd ouer
wth Great Dropps of Dew, and besides a great Deale ^ /many drops of water,/ were obserued
to be runn off from the bottell into the scale in wch. it stood. wch.
by him was attributed wholy to the warmth. and vapourousnesse
of the air of the Bottom of the Well, and the exceeding coldnesse
of the Bottle Lett down wch. condensed the vapours of that air into
water.
mr. Henshaw and Dr Croon mentiond the Reaking of well water
in frosty weather wch ^ /the/ /. . ./ /of wch. in cold weather/ wch. was attributed to the warmth of the water
and coldnesse of the air. not . . . that the water -
mr Hooke Related conceiued that this was occasiond partly by the
coldnesse of the air condensing the steames wch. Doe continually
rise not only from well water but from all other water when
of Such a Degree of Heat. Insoemuch that all water exposed to the