Extracted from "The Microscope” by Henri Van Heurck, 1893
Microscope No. 4 (fig, 153) with an ordinary stage, can be inclined
and is furnished with rapid and slow movements. Illumination is
effected by a plano-concave mirror. Under the stage a system of tube
diaphragms is fixed, sliding into grooves. An Abbe condenser, a
triple nose-piece, ordinary objectives I. III, V., and 1/12
homogeneous immersion of N.A, 1.3, oculars I and III, the latter
with micrometer test objects, glass slips, &c, are the
accessories which usually accompany this instrument. Thus equipped,
stand No. 4 gives a magnification of from 30 to 1,500
diameters.
