Subject ASC0003j4h
Journal of the Royal Microscopical Society.
ser.2:v.1:pt.1:no.1-3 (1881), Page 397 (1878-1968.)
New York Botanical Garden, LuEsther T. Mertz Library
BHL Page 31227558
Keywords
estimate aperture microscope microscopy radiant angle uncover object line crescent focus centre concave refraction