TABLES 149-151. 

 STANDARD WAVE-LENGTHS. 



TABLE 149. Standard Iron Lines. Fabry-Bulsson Values. 



Referred to the Cd line, ^=64 38.47 22. 



Source: electric arc; current: 3-5 amperes; voltage: generally no volts. 



Taken from Fabry and Buisson, Astrophysical Journal, 28, 1908. 



* These columns give the differences: Fabry-Buisson minus the corresponding iron line in Rowland's Preliminary 

 Table of Solar Spectrum Wave-lengths. 



TABLE 150. -Absolute Wave-length of Red Cadmium Line In Air, 760 mm. Pressure, 15 0. 



6438.4722 Michelsen. 



6438.4696 Fabry and Perot. 



For arc and spark lines of titanium, manganese, and vanadium (on above system of wave-lengths), see Kilby, 



Astrophysical Journal, 30, 1909. 



TABLE 161. Some ol the Stronger Lines of Some of the Elements. 



SMITHSONIAN TABLES, 



