Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 192
parallel direction on the Speculum turned towards thewindow to receive them, are reflected upon a small object in itsfocus, so as to illuminate it sufficiently brightly for most purposes;but a much stronger light may be concentrated on it, when theSpeculum receives its rays from a lamp placed near… … Becks Parabolic Speculum. 138 ACCESSORY APPARATUS. Fig. 89.
Microscopy · Biology
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
