Abstract
YOUR reviewer objects to a statement in my “Theory of Magnetic Measurements,” to the effect that freshly-magnetized needles give untrustworthy readings for several minutes after magnetization (see NATURE, vol. xxxvi. p. 316). In reply to his statement that this is contrary to experience, I wish to say that it is not contrary to my experience. In working with two 8-inch needles I continually observed this phenomenon for years, and it was so marked that I could not feel satisfied to omit the precaution which the critic condemns. I know of one other observer who has had a similar experience with another needle. My needles were not very hard, and perhaps this may have had to do with the phenomenon.
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RÜCKER, A., NIPHER, F. Instability of Freshly-Magnetized Needles. Nature 37, 77–78 (1887). https://doi.org/10.1038/037077b0
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DOI: https://doi.org/10.1038/037077b0
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