Abstract
A REVISED edition of "British Standard 904", first issued in 1940, has recently been published (British Standard 904 : 1948. Dimensions of Instrument Jewels. Pp. 12. (London : British Standards Institution, 1948.) 2s. net). The forms and dimensions of V-jewels, ring stones and end stones for instrument purposes, and compass jewels, are specifiad ; and in an appendix the method and apparatus required for the inspection of jewels is described. The Standard does not relate to jewels for watches and clocks, for which a separate British Standard is being prepared, nor to cup jewels for integrating meters, the form of which is still the subject of research.
Article PDF
Rights and permissions
About this article
Cite this article
Jewels for Instruments. Nature 162, 843 (1948). https://doi.org/10.1038/162843b0
Issue Date:
DOI: https://doi.org/10.1038/162843b0