By the tenacity,or force of cohesion,of the fibres: which is one of the forces in nature,and which we can measure exactly against other mechanical forces,and ascertain how much of any of them it suffices to neutralize or counterbalance.

• 靠的乃是纤维的粘性，或内聚力，这是自然界中的一种力，我们能参照其他机械力精确地测定它，并能弄清立足够抵消或抗衡多大的机械力。