"The Galatea Butterfly, *P. Galatea*, A Euoprean species, called *The Half-Mourning Butterfly*,…

Illustration of equal circles to show that an inscribed angle is measured by half the arc intercepted…

"The contours of a half sphere are a series of circles, far apart near the center (top) and near together…

"This will be understood [here] where the ray of light A B, proceeding from the eye, falls perpendicularly…

"Parted per pale, gules and argent. PARTY PER PALE. This signifies a shield parted by a perpendicular…

A circle subdivided into one quarter, three twelfths, and one half.

A circle subdivided into one quarter, two eighths, and one half.

Illustration of 2 right rectangular prisms. The bases are congruent, but the height of the smaller prism…

Illustration of 2 right rectangular prisms. The bases are congruent, but the height of the smaller prism…

Illustration of a the bottom half of a regular dodecahedron. A regular dodecahedron is a polyhedron…