The field of view is usually about 40° at a magnification of 1 5.
There are three eyepieces which are mounted on a revolving sleeve in such a way that any one of them can be quickly brought into use, to give the magnification suitable to the height of the mast.
The magnification is too small to show the zebra striping of the pearlite.
Lockhart Clarke (1817-1880), one of the earliest investigators of nervous pathology, the improvement of the compound microscope had not attained the achromatism, the penetration and the magnification which have since enabled J.
He then describes the effects of magnification from a combination of lenses or mirrors, adding: - "But of these conclusions I minde not here to intreate, having at large in a volume 2 by itselfe opened the miraculous effects of perspective glasses."