The works of the Honourable Robert Boyle, Esq., epitomiz'd by Richard Boulton ... ; illustrated with copper plates.

TITLE XIV. Of the Power of Custom to enable Animals to hold out in Air too much Rarified for Respiration.

EXPERIMENT I.

* 1.1A Small Mouse being conveigh'd into a Viol with a Wide Neck, a Bladder was ty'd up∣on it, which had all the Air express'd out of it. This being conveigh'd into a Receiver with a Gage; a fourth part of the Air was only re∣maining in it; upon which, the Bladder was half distended with rarifi'd Air, and the Mouse was very uneasie, and ill; but that rarifi'd Air by an Ingress of External Air being condens'd, it presently recover'd.

〈1 page duplicate〉〈1 page duplicate〉

〈1 page duplicate〉〈1 page duplicate〉

EXPERIMENT II.

THE Experiment being repeated, and the Mouse kept in the rarifi'd Air four Minutes, was very ill, and with much difficulty recover'd in the outward Air, trembling for a long time.

EXPERIMENT III.

THE same Mouse being again shut up, was a quarter of an hour in rarifi'd Air, and when taken out, sooner recover'd than before, and with less trembling.

EXPERIMENT IV.

THE same Mouse being again conveigh'd into a Receiver, after it had recover'd its Strengh, the Air was a little further rarifi'd than before: At the first, the Mouse seem'd dis∣compos'd; but after continu'd quiet a quarter of an hour. The Air being expanded by three Exsuctions more, it seem'd ready to die, but Air being let in again, it presently recover'd.

Notes

• * 1.1

  The Pre∣valency of Custom to enable Ani∣mals to con∣tinue in Vacuo.