Of the AttraSiion of Cohesion.

Sides of a Glass Vessel, and into Tubes ofSandy Ashesy Sugar, Sponge , and all porousSubstances.

The

5. These Planes adhere by other Sorts of Matter withForces as in the Table below, where the Weights ne-cessary to separate them are specified:

With Water — — 12 Ounces.

With Oil — — 18 Ounces.

With Venice Turpentine — 24 Ounces.

With Rosin — ■— 850 Pounds.

With Tallow Candle — 800 Pounds.

With Pitch — — 1400 Pounds.

Though these Experiments would net always give thefame Numbers, yet they sufficiently shew the vast at-tractive Forces, and the very great Difference betweentherm

6. After this he gives us an Account of his Experi-ments made to find the Force with which Bodies coherenaturally, or what is the absolute Force of Cohesion invarious Bodies, which he estimates by the Weights re-quired to pull them asunder, drawing according to theirLengths this he tried first in Wood, and afterwards inMetal. His Pieces of Wood were of a long squareForm, of which each Side was -,-53 of an Inch, andby Weights suspended they were drawn asunder, accord-ing to the .several Sorts, as mentioned below:

Wood of Lindcn-Treeof Alder —■of Fir —of Oak —of Elm —of Beech —of Ash —

IOOO Ib.loco600115095012501250

7. The Trial he made with Metals was of Weightssuspended to Wires of each Sort, whose Diameter was■A of a Rhinland Inch; or because the Rhinland Foot isto ours as 139 to 135, the Wire was r'i i% Parts of anInch Englijh. The Metals and Weights were as follow:

C 3 Of

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