Bulletin of the Bureau of Standards最新文献

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Methods of measuring the inductances of low-resistance standards 低阻标准电感的测量方法
Bulletin of the Bureau of Standards Pub Date : 1915-10-01 DOI: 10.6028/BULLETIN.270
F. Wenner, E. Weibel, F. Silsbee
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引用次数: 6
Absorption, reflection, and dispersion constants of quartz 石英的吸收、反射和色散常数
Bulletin of the Bureau of Standards Pub Date : 1915-05-01 DOI: 10.6028/BULLETIN.259
W. Coblentz
{"title":"Absorption, reflection, and dispersion constants of quartz","authors":"W. Coblentz","doi":"10.6028/BULLETIN.259","DOIUrl":"https://doi.org/10.6028/BULLETIN.259","url":null,"abstract":"cent, if we admit an error of 2 parts in 1000. This property of great transparency in one spectral region, and great opacity in a closely adjoining region, requires the employment of thick samples of quartz in order to determine accurately the transmission in the intervening region. The whole investigation requires a special procedure, which one would not ordinarily undertake. The data obtained in the present investigation are therefore published with the hope that they may be of use to others. A preliminary 2 examination of several samples of quartz was recently published. One sample consisted of two plates, each 6.5 mm in thickness. Inadvertently, as published, the thickness is stated to be 13 mm, with no mention that it represented two","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"475 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1915-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115872230","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}
引用次数: 7
Equilibrium in the system: lead acetate, lead oxide, and water, at 25 degrees 系统平衡:醋酸铅,氧化铅和水,温度25度
Bulletin of the Bureau of Standards Pub Date : 1915-05-01 DOI: 10.6028/BULLETIN.254
R. F. Jackson
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引用次数: 1
Specific heat of copper in the interval 0 degrees to 50 degrees, with a note on vacuum-jacketed calorimeters 铜的比热在0度到50度之间,并在真空夹套量热计上注明
Bulletin of the Bureau of Standards Pub Date : 1915-03-01 DOI: 10.6028/BULLETIN.253
D. R. Harper
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引用次数: 4
The emissivity of metals and oxides. I. Nickel Oxide (NiO) in the range 600 degrees to 1300 degrees C 金属和氧化物的发射率。1、氧化镍(NiO): 600℃~ 1300℃
Bulletin of the Bureau of Standards Pub Date : 1914-11-01 DOI: 10.6028/BULLETIN.246
G. Burgess, P. D. Foote
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引用次数: 6
Influence of atmospheric conditions in the testing of sugars 大气条件对糖试验的影响
Bulletin of the Bureau of Standards Pub Date : 1914-07-01 DOI: 10.6028/BULLETIN.241
F. Bates, F. P. Phelps
{"title":"Influence of atmospheric conditions in the testing of sugars","authors":"F. Bates, F. P. Phelps","doi":"10.6028/BULLETIN.241","DOIUrl":"https://doi.org/10.6028/BULLETIN.241","url":null,"abstract":"That atmospheric conditions may exert an appreciable effect in the testing of sugar has been vaguely recognized for some years. The magnitude of this influence has, however, never been determined, and it is difiicult to understand how this possible source of error has so long been practically ignored when we consider the large amount of research that has been carried on in an effort to reduce the process of testing to an exact science. Fortunately in the standardization of the saccharimeter, by means of the normal solution of sucrose, all chance of error from atmospheric conditions is eliminated. The normal weight of sucrose is made up to volume, and the polariscope tube is filled, under conditions that eliminate an appreciable change in the concentration of the nrifiltered solution. In the process of testing, these conditions are unavoidably altered. The necessity for clarification requires that the liquid be passed once, and frequently twice, through ordinary filter paper to remove the precipitated impm-ities. While this is being done, there is more or less exposiure to the atmosphere of the laboratory, with a consequent increase in the concentration. Since the rotation observed is directly proportional to the concentration, any change, if appreciable, must either be prevented or a correction applied to the polarization. Browne ^ and other investigators have recommended the use of cover glasses on the funnels to guard against possible evaporation. The process of testing should obviously be such that when applied to the normal sucrose solution the polarization will be IOC on the saccharimeter scale within the limits of accuracy","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1914-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122430063","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}
引用次数: 1
The silver voltameter - Part IV. Third series of quantitative experiments and special investigations 银电压表。第四部分。第三系列定量实验和专题研究
Bulletin of the Bureau of Standards Pub Date : 1914-07-01 DOI: 10.6028/BULLETIN.240
E. B. Rosa, G. W. Vinal, A. S. McDaniel
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引用次数: 2
Critical ranges A(sub)2 and A(sub)3 of pure iron 纯铁的临界范围为A(sub)2和A(sub)3
Bulletin of the Bureau of Standards Pub Date : 1914-04-01 DOI: 10.6028/BULLETIN.233
G. Burgess, J. Crowe
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引用次数: 3
Comparison of the silver and iodine voltameters and the determination of the Faraday 银、碘电压表的比较及法拉第的测定
Bulletin of the Bureau of Standards Pub Date : 1914-04-01 DOI: 10.6028/BULLETIN.238
G. W. Vinal, S. Bates
{"title":"Comparison of the silver and iodine voltameters and the determination of the Faraday","authors":"G. W. Vinal, S. Bates","doi":"10.6028/BULLETIN.238","DOIUrl":"https://doi.org/10.6028/BULLETIN.238","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1914-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122964491","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}
引用次数: 5
Windage resistance of steam-turbine wheels 汽轮机车轮的风阻
Bulletin of the Bureau of Standards Pub Date : 1914-02-01 DOI: 10.6028/BULLETIN.228
E. Buckingham
{"title":"Windage resistance of steam-turbine wheels","authors":"E. Buckingham","doi":"10.6028/BULLETIN.228","DOIUrl":"https://doi.org/10.6028/BULLETIN.228","url":null,"abstract":"","PeriodicalId":227231,"journal":{"name":"Bulletin of the Bureau of Standards","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1914-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133905830","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}
引用次数: 7
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