Appendix 1 Description of Mr. Gascoigne’s Micrometer
In [Fig. 3.3], the fig. 1, 2, and 3, represent the several parts of this instrument; fig. 4, part of the telescope with the instrument applied to it, and 5 the rest on which the whole is supported. Fig. 1 represents the brass box with the whole instrument, except only the moveable cover, and the screws by which it is fixed to the telescope.