Subject ASC0003jm8
Journal of the Royal Microscopical Society.
ser.2:v.5:pt.2:no.4-6 (1885), Page 865 (1878-1968.)
New York Botanical Garden, LuEsther T. Mertz Library
BHL Page 31219990
Keywords
Hélot-Trouvé electrical illumination Heurck van H. battery accumulator ebonite box standard photophore illuminating apparatus photomicrography Stearn Lamp electric light zoology botany microscopy incandescent lamp lens Dr. Van Heurck lamp lamp branch