Atmospheric Micrography. On the Means by which all the Corpuscles Normally Invisible, contained in a Determinate Volume of AIR., may be collected into an infinitely Small Space
Maria Apparecida Pouchet · Journal of Cell Science · 1860
ABSTRACT I have succeeded, by means of a very simple instrument, in concentrating, upon an infinitely minute surface, all the solid and normally invisible corpuscles floating in the atmosphere, so as to allow of their being strictly appreciated and counted. By this means we can, if we please, concentrate on a glass, and within a space of two square millimetres, all the particles disseminated in a cubic mètre of the atmosphere, or even more.