{"title":"The resolving power of objectives","authors":"P. Nutting","doi":"10.6028/BULLETIN.134","DOIUrl":"https://doi.org/10.6028/BULLETIN.134","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121536574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The theory of the Hampson Liquefier","authors":"E. Buckingham","doi":"10.6028/BULLETIN.135","DOIUrl":"https://doi.org/10.6028/BULLETIN.135","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117315855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A volt scale for a watts-per-candle meter","authors":"H. Ives","doi":"10.6028/BULLETIN.123","DOIUrl":"https://doi.org/10.6028/BULLETIN.123","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129192550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A tungsten comparison lamp in the photometry of carbon lamps","authors":"H. Ives, L. R. Woodhull","doi":"10.6028/BULLETIN.125","DOIUrl":"https://doi.org/10.6028/BULLETIN.125","url":null,"abstract":"In the photometry of incandescent lamps the substitution method is commonly used. That is, the lamp measured is not compared directly with a standard, but with a \"comparison lamp\" which is carefully calibrated against a candlepower standard or standards at the beginning of a run, and at frequent intervals. This method is adopted not only to obtain the greater accuracy of a substitution method, but to avoid operating a valuable standard continuously, with consequent comparatively rapid change in its value. After the standard check, the results of the measurement depend entirely upon the correctness and constancy of the comparison lamp. Since, however, the comparison lamp is subject to the changes inherent in the type of filament, it is necessary with carbon lamps to use only seasoned ones, and to keep close watch on their candlepower by checking with standards. Some time ago. Professor Rosa, who is in charge of the photometric work of the Bureau, requested us to try a Tungsten lamp, operated at voltages to give carbon lamp colors, as a comparison lamp in the testing of carbon filament lamps. The object in view was to obtain a long-lived and constant comparison light which at the same time would give perfect color match with all types of carbon lamps. It was expected that this would be found the case with the Tungsten lamp, because, first, the candlepower changes with this filament are small during life, even at rated voltage; secondly, the life of all glow lamps is greatly increased at high watts per candle, and the Tungsten lamp matches the carbon lamps in color at efficiencies near 3 watts per","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124334012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new method for the absolute measurement of resistance","authors":"E. B. Rosa","doi":"10.6028/BULLETIN.121","DOIUrl":"https://doi.org/10.6028/BULLETIN.121","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132021167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The coefficient of reflection of electrical waves at a transition point","authors":"L. Cohen","doi":"10.6028/bulletin.124","DOIUrl":"https://doi.org/10.6028/bulletin.124","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The influence of terminal apparatus on telephonic transmission","authors":"L. Cohen","doi":"10.6028/bulletin.111","DOIUrl":"https://doi.org/10.6028/bulletin.111","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1908-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115245189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Methods of obtaining cooling curves","authors":"G. Burgess","doi":"10.6028/bulletin.109","DOIUrl":"https://doi.org/10.6028/bulletin.109","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1908-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116333728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Note on the approximate values of Bessel's functions for large arguments","authors":"L. Cohen","doi":"10.6028/BULLETIN.110","DOIUrl":"https://doi.org/10.6028/BULLETIN.110","url":null,"abstract":"yo and Jt represent the Bessel functions of the first kind and of the zero and first order, respectively. G and Gx represent functions which are combinations of the Bessel functions of the first and second kinds, and have the property that the functions approach zero when the arguments become very large. The values of GQ(ix) and Gx{ix) in terms of the Bessel functions of the first and second kinds are given by the following equations: *","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1908-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121446995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Remarks on the quartz compensating polariscope with adjustable sensibility","authors":"F. Bates","doi":"10.6028/BULLETIN.108","DOIUrl":"https://doi.org/10.6028/BULLETIN.108","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1908-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122870130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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