"The constellation Andromeda, including its stars down to 5th magnitude, according to Heis; the figure…

Illustration of the superposition of two angles to compare magnitudes of the same kind.

Diagram showing the relative magnitude of the hiatus in the various sections in a compound regressive-transgressive…

Indicator that establishes the horizontal when a bubble is centered in a tube of liquid

Illustration showing two points a and b to be in the same plane and parallel.

Illustration showing two points a and b to be in the same plane and parallel.

Illustration showing three points a, b, and c in motion. The magnitude and direction of a and b are…

Illustration used "If three component motions ab, ac, and ad are combined, their resultant af will be…

Illustration "where ad is the given resultant, if the two components have the magnitudes represented…

Illustration used to resolve a motion into two components, one of which is perpendicular, and the other…

Illustration for rigidly-connected points. "If two points are so connected that their distance apart…

Illustration for rigidly-connected points. In the series of links shown, c and d are fixed axes and…

Illustration showing two component forces ab and ac acting upon point a. The result is the vector ad…