The most widely used method for measuring the size of particles in clouds and fogs is microphotography, but this method is too laborious and cumbersome. The possibility of developing the photoelectric methods for measuring the size of particles of liquid aerosols with a diameter of 2 microns and larger is demonstrated. The principle of the proposed photoelectric method for measurement of the spectrum of particle distribution in clouds and fogs consists in the use of a darkened field method. Author
Translation from Mezhvedomstvennaya Konferentsiya po Voprosam Issle-dovaniya Oblakov, Osadkov i Grozovago Elektrichestva, pp 197-199, 1957.