Observ. [32]. Of Hair.

The description of several sorts of Hair; their Figures and Textures: the reason of their colours, A description of the texture of the skin, and of Spunk and Sponges: by what passages and pores of the skin transpiration seems to be made. Experiments to prove the porousness of the skin of Vegetables.

Observ. [33]. Of the Scales of a Soale.

A description of their beauteous form.

Observ. [34]. Of the Sting of a Bee.

A description of its shape, mechanisme, and use.

Observ. [35]. Of Feathers.

A description of the shape and curious contexture of Feathers: and some conjectures thereupon.

Obser. [36]. Of Peacocks Feathers.

A description of their curious form and proprieties; with a conjecture at the cause of their variable colours.