Modified method for the determination of relative wave-lengths . A2, B^, D^, and can be made tobe sensibly a function of only the errors oi A^, B^, A^, B^. VI. THE APPARATUS AND ITS ARRANGEMENT The apparatus requisite for practicing the method consists of—An interferometer, the essential elements and accessory parts ofwhich are shown in Figs. 2 and 3 and enumerated in the keyaccompanying those figures; and Accessory apparatus for illumination and observation arrangedas shown in Fig. 4 and enumerated in the accompanying key. The following is a list of the important special parts of thisapparatu
Modified method for the determination of relative wave-lengths . A2, B^, D^, and can be made tobe sensibly a function of only the errors oi A^, B^, A^, B^. VI. THE APPARATUS AND ITS ARRANGEMENT The apparatus requisite for practicing the method consists of—An interferometer, the essential elements and accessory parts ofwhich are shown in Figs. 2 and 3 and enumerated in the keyaccompanying those figures; and Accessory apparatus for illumination and observation arrangedas shown in Fig. 4 and enumerated in the accompanying key. The following is a list of the important special parts of thisapparatus actually used in this plates (1,2, Fig. 2), by Pettididier, bed, mirror mountings, and flexure apparatus, designedby Dr. S. W. Stratton and constructed by Mr. O. G. Lange? in the Bureau of Standards screw (11, Fig. 2), by Brown and Sharpe, mm pitch,reading millimeters with smallest divisions on head (17, Fig. 2), 5 cm long, on silver, by Zeiss. Smallest divi-sion = 23
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectspectra, bookyear1910
