Pendulum that vibrated half seconds, but is thought to have its string strechd too long, I at the bottome reckond 4 semivibrations before the Bullet was come as I could guesse, within some yards of me.

A weather glasse with Aire at the bottome was, when the water stood at about 8 Inches, let downe 2 or 3 times, & drawne up again not to the top of the <tower>[replacing 'water', Boyle hand] but of the forementiond Battlements and at the <bottom>[in Boyle hand] it seemd each time to have its water depressd at least 3/8, if not 1/2 of an Inch in comparison to the hight at which the Liquor Stood while the Thermometer was upon the Battlements.

A Brasse valve of about an Inch Diameter was with Cæment well fastend to the shorter Legge (which was but of very few Inches in length) of a long Glasse Cyphon left open at the end of the other Legge; this valve being let downe to the Bottome of a tall Glasse Body full of water, soe that 'twas (as near as we could measure) beneath the surface of the water when there was let in as much water into the Pipe as reachd in that as high as the surface of the externall water, then about {ounce} i weight in the opposite Scale of a Ballance to whose neighbouring Scale one end of String was tyd, whose other end was [ 'some' deleted] fasten'd to the said valve. But when the water was emptyd out of the Pipe, & the valve was let downe to the former depth, there was requisite about 8 ounces, that is 4 ounces more then formerly to disjoyne the part of the valve, & let the water get in between, & when the Syphon being freed from water, the valve was lifted higher and higher with the pipe, there needed lesse & lesse weight to make a disjunction, 2 ounces of additionall weight ([space of 8-10 letters] requisite to counterpoise the valve it selfe) in water sufficeing to lift up the cover when the valve