𝔖 Bobbio Scriptorium
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The detection and measurement of water droplets

✍ Scribed by H. F. Liddell; N. W. Wootten

Publisher
John Wiley and Sons
Year
1957
Tongue
English
Weight
494 KB
Volume
83
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

The use of a dyestuff (Naphthol Green B) in gelatine, coated on the slides of a cascade impactor, provides a method for determining the drop‐size distribution of fogs and water sprays which is easy to apply in practice and gives a permanent record for subsequent microscopic analysis. Calibration of the stain remaining after evaporation of a droplet impacting on the slide shows it to be, on the average, 2.5 times the diameter of the droplet. The method can be readily used for droplets of less than 1 ΞΌ diameter.

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The electrification of freezing water dr
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## Abstract When supercooled drops of diameter 1Β·3 mm were nucleated at β€” 0Β·2$C and froze in an environment at β€” 15$C and fragmented, the average charge on positive residues was 1Β·5 Γ— 10^βˆ’3^ e.s.u., and on negative residues β€” 2Β·2 Γ— 10^βˆ’3^ e.s.u. The charges were comparable with those found in simil