Subject ASC0003jpm
Journal of the Royal Microscopical Society.
ser.2:v.6:pt.2:no.4-6 (1886), Page 682 (1878-1968.)
New York Botanical Garden, LuEsther T. Mertz Library
BHL Page 31220465
Keywords
lens instrument centering glass Ross planoconvex lenses ramsden circle microscopy focus adapter section cutaway microscope telescope ramsden