Arborescent Frost Patterns


ON Sunday last, December 4, I observed a curious phenomenon, which I do not remember having ever seen before in the streets of London. Along the Euston Road, the Marylebone Road, and other thoroughfares having an east and west direction the paving flags were all covered with a striking, vegetable like pattern which might be most appropriately described as an arborescent tracery. The pattern was not formed of the usual small and delicate frost figures such as we are familiar with on window panes, but was made up of large and boldly-fronded designs such as shown in the sketch, which I hurriedly made on the spot:—

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MELDOLA, R. Arborescent Frost Patterns. Nature 47, 125–126 (1892).

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