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From Nicolai Krohn   16 December 1881

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Summary

Perchloride of mercury applied to his lawn destroyed thousands of earthworms, but ruined the grass.

Author:  Nicolai Krohn
Addressee:  Charles Robert Darwin
Date:  16 Dec 1881
Classmark:  DAR 169: 124
Letter no:  DCP-LETT-13555

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  • 30 Gallons of cold water. — I then watered the lawn and the effect was simply amazing No sooner had I thrown the water on when,—before even the watering can was emptied,—the worms appeared. — They were crawling out by the hundreds and from their wriggling & turning about I must conclude that they were in great agony. I gave the plot of ground a watering from time to time during three weeks or so and, from a computation I made, I must have picked up something like 8000 worms—which is about 10  …
Document type
letter (1)
Author
Krohn, Nicolaidisabled_by_default
Addressee
Correspondent
Date
1881 (1)