70 
PROFESSOR W. N. HARTLEY AND MR. W. E. ADENEY 
The scale numbers of the fiducial lines of the various plates are given in the 
following tables. 
Tables giving in linear measurements the positions of the fiducial lines on the 
several spectra photographed. 
Spectra to the left. 
Portions 6-12. Measurements in hundredths of an inch. 
(i) 
Fiducial 
lines. 
Indium. 
Aluminium. 
Thallium. 
Copper. 
Carbon. 
Magnesium. 
Arsenic, 
Mean. 
I. 
o-ooo 
0-060 
0-030 
II. 
37-250 
37-250 
37"250 
37-250 
. . 
37-250 
37-250 
37-250 
III. 
74-305 
74-185 
74-365 
74-260 
74-300 
74-375 
74-380 
74-300 
IV. 
111-585 
111-505 
111-575 
111-575 
111-595 
111-54 
111-575 
V. 
148-825 
148-840 
148-795 
148-745 
148-835 
148-845 
148-780 
148-815 
VI. 
186-225 
186-225 
186-190 
186-380 
186-165 
186-186 
186-250 
186-210 
VII. 
223-695 
223-725 
223-620 
223660 
223-675 
223-740 
223-685 
VIII. 
261-400 
261-365 
261-295 
261-455 
261-335 
261-240 
261-450 
261-350 
IX. 
299-155 
299-175 
299-09 
299-135 
299-110 
299-110 
299-145 
X. 
337-260 
337-200 
337-175 
337-350 
337-280 
337-255 
( 2 ) 
Fiducial lines. 
Lead. 
Tellurium. 
Tin. 
Mean. 
I. 
II. 
37-250 
37-250 
37-250 
III. 
74-555 
74-440 
74-345 
74-500 
IV. 
111-700 
111-750 
111-660 
111-700 
V. 
149-070 
149-025 
149-030 
149-050 
VI. 
186-430 
186"465 
186-370 
186-450 
VII. 
223-980 
223-985 
224-020 
223-985 
VIII. 
261-700 
261-660 
261-695 
261-680 
IX. 
299-570 
299-585 
299-540 
299-575 
X. 
337-655 
337-530 
337-600 
337-590 
( 3 ) 
Fiducial lines. 
Iron. 
Nickel. 
Mean. 
I. 
II. 
37-250 
37-250 
37-250 
III. 
74-350 
74-240 
74-295 
IV. 
111-485 
111-440 
111-465 
V. 
148-665 
148-620 
148-645 
VI. 
185-965 
186-050 
186-010 
VII. 
223-490 
223-510 
223-500 
VIII. 
261-110 
261-265 
261-190 
IX. 
298-885 
299-100 
298-995 
X. 
336-880 
337-050 
336-965 
