ON WAYE-LENGTII TABLES OF THE SPECTRA OF THE ELEMENTS. 389 



Gold. 



» Observed also in the Spark Spectrum of solution of Gold Chloride by Lecnq de Boisbandran. ■who 

 ■.rives also lines at 5725, t5001, f545S, t5347, f5310, t5287, 5259, f5212, f5212, 5172. f5U3, f5125, 4U0S, 4J37, 

 4338, 4314 and 4064. 



t Observed by Lecoq de Boisliaudran in the Flame, Spectrum of Gold Chloride, as well as line ^ at 

 5477, 5437, 5418, 03U4, 5328, 5263, 5222, 5179, 515S, 5102, 50S0, 5041, 4396, 4516, 4430. 



Hydrogen. 



Note. — Certain lines measured by Huggins in the photographic spectra of the 

 stars are, in all probability, due to Hydrogen. They have the following wave-lengths 

 —3767-5, 3745-5, 3730, 37175, 3707-5, 3699. 



