"Object glass" Quotes from Famous Books
 ... The amount of the movement can be accurately read. Thus two fields of view overlap, and the adjustment is made to bring an image of one star over that of another star, and then to do the same by a displacement in the opposite direction. The total movement of the half-object glass is double the distance between the star images in the focal plane. Such an instrument has long been established at Oxford, and German astronomers have made great use of it. But in the hands of Sir David Gill (late His Majesty's Astronomer at the Cape of Good Hope), and especially ...
— History of Astronomy • George Forbes
... even in perfect states of consciousness on the part of those whose brains have been laid bare, there can be no certainty that the molecular action, if any, is referable to one set of movements more than another. And even in the case of animalcules, as seen in the object glass of the microscope, there is no absolute certainty that their quick, darting or jerking movements are due to any life-manifestation, as heretofore assumed. Some quite as well defined forms are entirely motionless, and if all were so, it would ...
— Life: Its True Genesis • R. W. Wright
... scattering of the red and of the blue rays; and proceeding so far as to demonstrate things which were not supposed even to exist, he examines the inequalities which arise from the shape or figure of the glass, and that which arises from the refrangibility. He finds that the object glass of the telescope being convex on one side and flat on the other, in case the flat side be turned towards the object, the error which arises from the construction and position of the glass is above five thousand times less than the error which arises from the refrangibility; ...
— Letters on England • Voltaire |
