Their research has been published in the Proceedings of the National Academy of Sciences (PNAS). Dark-field microscopy is a powerful technique used to visualize unstained samples by illuminating them ...
Ltd., which allows a suitably modified E.M.6 electron microscope to be used with equal facility for high-resolution dark-field or light-field work.
Transactions of the American Microscopical Society Vol. 39, No. 2, Apr., 1920 Modern Dark-Field Microscopy and the His... Modern Dark-Field Microscopy and the History of Its Development This is the ...