74 
PROFESSOR W. N. HARTLEY AND MR. W. E. ADENEY 
Table of means and numbers adopted as correct measurements of the fiducial lines 
on each plate (continued). 
Spectra to the left. 
Portions 6-12 (continued). Measurements in hundredths of an inch. 
( 3 ) 
Fiducial lines. 
Mean 
measurements. 
Adopted numbers. 
Intervals. 
1 . 
II. 
37-25 
37-20 
37-075 
III. 
74-295 
74-275 
37-175 
IV. 
111-465 
111-45 
37-275 
V. 
148-645 
148-725 
37-375 
VI. 
186-01 
186-10 
37-475 
VII. 
223-50 
223-575 
37-625 
VIII. 
261-19 
261-20 
37-775 
IX. 
298-995 
298-975 
37-975 
X. 
336-965 
336-95 
Portions 11-18. Measurements in hundredths of an inch. 
( 4 ) 
Fiducial lines. 
Mean 
measurements. 
Adopted numbers. 
Intervals. 
XV. 
o-ooo 
o-ooo 
48-65 
XIV. 
48-65 
48-65 
49-65 
XIII. 
98-275 
98-30 
50-65 
XII. 
148-965 
148-95 
51-75 
XI. 
200-73 
200-70 
53-00 
X. 
253-62 
253-70 
54-35 
IX. 
308-115 
308-05 
