ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNote on Partial and Total Immersion Thermometers.C. W. Waidner and E. F. MuellerCite this: Ind. Eng. Chem. 1921, 13, 3, 237–240Publication Date (Print):March 1, 1921Publication History Published online1 May 2002Published inissue 1 March 1921https://pubs.acs.org/doi/10.1021/ie50135a024https://doi.org/10.1021/ie50135a024research-articleACS PublicationsRequest reuse permissionsArticle Views34Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

Bulletin of the Bureau of Standards [voi.n even less is sometimes desired.The former requires resistance measurements with an accuracy of about i in 300 000, while the latter, involving the measurement of a small change in a large quantity, requires a precision in each measurement of the order of 1 part in 3 000 000 or more.In nearly all cases in which such measurements have been made the electrical apparatus has been of special design. MERCURY LINKS AND SHUNT DIALSTo attain the above accuracy in measurements of resistances of the magnitudes usual in resistance thermometry (1 ohm to 100 ohms) , the errors due to contact resistances of plugs, switches, etc., must be minimized.One familiar method of doing this is by use of mercury-cup contacts for links connecting the parts of the circuit.This is fairly satisfactory for the larger valued decades of a Wheatstone bridge, but is impracticable for several reasons in the decades comprising small fractions of an ohm.An excellent device for these which fulfills the requirement of greatly dimin- ishing the effect of dial contact resistances is constructed on the well-known principle of changing the resistance of a circuit by shunting a small resistance with a much larger variable one. 1 The contact resistance of the switch is here a part of the shunting branch, and only a small fraction of its total variation enters into the final result.3.

Report issued by the Bureau of Standards over studies on ocean temperatures. Temperatures in the vicinity of icebergs are measured and compared with temperatures taken from other areas of the ocean. This report includes photographs, and illustrations.

In view of the general use and convenience of the sulphur boiling point as a temperature for the standardization of thermometric apparatus, it is highly desirable to demonstrate conclu- sively by experiment that we are really dealing with a strictly reproducible and satisfactorily constant temperature throughout the column of vapor in the standard form of sulphur boiling apparatus, which is generally used.

Report issued by the Bureau of Standards over platinum resistance thermometry. The advantages and limitations at high temperatures are discussed. This report includes tables, and illustrations.

Report issued by the Bureau of Standards over platinum resistance thermometry. The advantages and limitations at high temperatures are discussed. This report includes tables, and illustrations.

Received 19 February 1907DOI:https://doi.org/10.1103/PhysRevSeriesI.24.441©1907 American Physical Society

It is becoming generally recognized by engineers and technical men in charge of industrial processes carried out at high temperatures that it is usually necessary to measure and control the temperatures of these processes, and many instances might be cited where a change of less than 20°C . in the heat treatment radically alters the resulting product, and often such a small temperature change occurring unnoticed necessitates later the rejection of the completed product.