(2056) 
or 5 hours after that. And the place I did it in being one,whereI thought 
my fclf ag it were at home, I firft let in the Air, to try if the Mites were 
not quite dead, and though neither upon its rurtiing in, nor during my 
flay there, I could perceive any of them to ftir yet I left the Receiver 
unRopt as it was in the Window, upon a fufpition that the Air might 
not be able to produce its operation upon them in a /hort time. 
3. And therefore parting by the fame place about 2^ or 3 daycs after, 
I called in to look upon my Receiver, and found a number of my little 
Animals revived, as an attentive Eye might eafily perceive by the mo- 
tion of certain little white fpefts, when it was helped to obferve it by 
little marks, I made on the outfide of the GUfs (which was purpofely 
chofen thinn and clear ) near this or that Mite,with a Diamond i>y the 
approach to, or Recefs from which Marks, the progreffive motion became 
( perhaps within a minute j plainly difcoverable,efpeciaIly if vre ufed tb€ 
following Expedient, (w^ich I found the bell: of thofe I try'd,) namely, 
That,when the Eye perceived little white fpecks that looked like Mites, 
theReceiver fhould be fo turned and returned, that the bellies and feet 
of thofe little Creatures were uppermoft, notwithftanding which they 
would not eafily drop down,but continue their motion ^ which fpecks 
being made upon the Concave furface of the thin Glafs it felf (to which 
you may approach your Eye as much as you pleafe Jarc thereby rendred 
much more eafily vifible. But,this being only intimated upon the By, I 
proceed to take noticc,thatin the newly mentioned Receiver the Mites 
didjby ftirring up and down,continue to appear alive for 2 or 3 daycs 
after,if not longer. I fliould not, I confefs, have thought it ridiculous 
to fufped,that the Mites,which at firft lof} their motion,did at laft real- 
ly dye, and that thofe,I after faw ftirring up and do wn , were others new- 
ly generated in the included mouldy Cheefe : But I was not apt to 
think this fufpicion probable not only becaufe of the extream difficul- 
ty of making any living Creature to be generated in Vacuo Boyliam^ but 
becaufe it did not fcem agreeable to what I elfewhere noted about the 
way and time of thePropagation of Mites,whofeEggsI have divers times 
obferved with pkafure,that at a feafon of the year, that was not favou- 
rable (for thefe things happened in a cold Marchy) newly generated 
Mites Ihould in 2 or 3 dayes grow up to their juft bignefs,which feveral 
of thofe, we obferved, feemed to have attained. 
4. But becaufe it doth not by the third Phoenomenon appear. Whether 
or no, in cafe our Mites had been kept in a movelefs ftati for a much 
confiderablerj time then 3 or 4hours,they would have been recoverable 
by the admiflion of the Air I fliall add,to fatisfy that doubt, That one 
of the Portable Receivers above-mentioned, being exhauiled and care- 
fully fccured from the regrefs of the Air, was kept from Munday morn- 
ing to Tburfday morning ; after all which time, our attentive Eyes be- 
ing unable to difcover any figns of L ife among the included Mites, the 
Air was let in upon them,and,after no long time, had fuch an operati- 
on upon them, that both I and otihcrs could plainly fee them creep up 
and down in the Glaffes again* An 
