Subject ASC0003izf
Journal of the Royal Microscopical Society.
v.2:pt.2:no.4-7a (1879), Page 775 (1879)
New York Botanical Garden, LuEsther T. Mertz Library
BHL Page 9556212
Keywords
apertometer measurement angle universal Apertometer measure apparatus microscopy universal apertometer Apertometer measuring true angles degrees lenses