Sound Wave
"Lightly touch the wire at its middle point with the tip of the finger or the beard of a quill; the…
Barbed and Forked Spike
"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…
Cut Spike
"A large nail or pin, generally of iron. The larger forms of spikes, particularly railroad spikes, are…
Head of a thyrsus
"Shows the head of a thyrsus composed of the leaves and berries of the ivy, and surrounded by acanthus…
Triangle With Bisectors of Base Angles
Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point…
Perpendiculars Dropped Any Point in the Equilateral Triangle
Illustration to show the perpendiculars dropped from any point in the equilateral triangle to the three…
Point in Base of Isosceles Triangle
Illustration to show that the difference of the distances from any point in the base produced of an…
