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- Title
Particle Counts in the Ultramicroscope.
- Authors
BADGER, E. H. M.
- Abstract
WHEN using the type of ultramicroscope designed by Prof. Whytlaw-Gray1 for the counting of particles in smoke and other aerosols, a stream of gas is passed intermittently through a glass cell of known dimensions, which is strongly illuminated. The number of particles which scatter light is noted each time the gas stream stops. The distribution of particle counts was found to follow a Poisson series very closely. Thus the number of times one would expect to find 0, 1, 2, 3 ... n particles in the field is given by where N is the total number of fields counted and is the average number of particles per field2.
- Publication
Nature, 1946, Vol 157, Issue 3989, p480
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/157480b0