of the Spectral lines of the Elements. 195 
. Huggins’s scale between 589°5, or C, and 4671, which lies 
about half way between Gand H. Of the correctness of the 
identification of the lines I shall be able I think to furnish sat- 
f. 
tained, 
_ In this table the column H gives the scale-number of the 
line ; 4 the wave length.as observed, #’ the wave length as oar 
culated by the formula obtained, 4 the difference between the 
observed ‘and calculated wave-lengths, a: 
for each group of data. The wave-lengths mark f are 
of Ditscheiner ; the others are given by Angstrom. 
