PER- n.
Originally, denoting that the element to the name of which it is prefixed in the respective compounds exercised its highest valence; now, only that the element has a higher valence than in other similar compounds; thus, barium peroxide is the highest oxide of barium; while nitrogen and manganese peroxides, so-called, a…
PROOF a.
a temperature of 51º Fahrenheit weigh exactly the second, third, and fourth proof spirits respectively. -- Proof staff, a straight-edge used by millers to test the flatness of a stone. -- Proof stick (Sugar Manuf.), a rod in the side of a vacuum pan, for testing the consistency of the sirup. -- Proof text, a passage…
QUADRANT n.
horizon glass, are fixed one upon the index arm and the other upon one side of the frame, respectively. When the instrument is held upright, the index arm may be swung so that the index glass will reflect an image of the sun upon the horizon glass, and when the reflected image of the sun coincides, to the observer's ey…
SIMILAR a.
ts similarly situated. -- Similar rectilineal figures, such as have their several angles respectively equal, each to each, and their sides about the equal angles proportional. -- Similar solids, such as are contained by the same number of similar planes, similarly situated, and having like inclination to one another.…