A general theory for the mensuration of the angle subtended by two objects, of which one is observed by rays after two reflections from plane surfaces, and the other by rays coming directly to the spectator's eye
By: [G. Atwood]
Publisher: [publisher not identified]
Published: 1781
Place of publication: London]
Language: eng
Number of pages: 41
Notes: Extr. from Phil. Trans., vol. lxxi.

ESTC N493327.