IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. A capillary electrometer measures ...

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IN reply to your correspondent “J.-S.” (p. 151), I may say that the model which I saw did actually work; it illustrated the flow of mercury from a fine jet when subjected to the influence of a small ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

ON p. 129 of vol. lxv. of NATURE, a description is given of an electro-capillary relay. The writer states that the actual apparatus was not seen by him, “but only a working model.” It would be highly ...