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

EXPERIMENT V.

Vacuum.

• Feb. 17.77.* 1.1 THREE Onions being enclos'd in Va∣cuo.
• Feb. 19 The Ascent was 1
• Feb. 21 The Ascent was 1
• Feb. 25 The Ascent was 9
• May 4 They were not al∣ter'd.
• May 18 They were not al∣ter'd.
• Jun. 19 The onions rot∣ten.

Rarified Air.

• Feb. 17. Three Onions were enclos'd in Air, so far ra∣rifi'd, that it sustain'd only 10 Digits of Mer∣cury.
• Feb. 19. The Mercury ascended not. 21. They had acquir'd a Mouldiness. 25. The Mercury as∣cended 7 Digits.
• May 4. No Alteration in the Onions. 18. No Alte∣ration in the Onions, but the Receiver was forced from the Cover.

Common Air.

• Feb. 17. Three Onions were included in a Receiver, not exactly shut.
• Feb. 21. They were not mouldy; but bud∣ded. 25. They shot forth their Roots.

• May 4. They began to be Mouldy.
• This Experiment shews, that some Bodies yield Air as well in rarified Air as in Vacuo. As also that Vegetation is promoted by Air. It is here likewise worth our Notice, that whilst the Onions shot forth, they did not grow Mouldy

Notes

• * 1.1

  Onions in Vacuo.