1052 
PROFESSOR W. R. HARTLEY OR 
Plate 5. “ Blow ” 50, Boiler-plate. 
Edwards’ isochromatic instantaneous plate, stained with cyanine. 
b. 
m. 
Dui-ation of exposure 
“ Blow ” commenced at . 
... 4 
0 
1st siDectrum, exposure commenced at . 
... 4 
4 
4 minutes 
2ud „ „ „ ... 
... 4 
8 
3 
orcl j, ,, ... 
... 4 
11 
4tb blaze from spiegel-eisen 
End of “ blow ”. 
... 4 
16 
At the second exposure the blowing became very wild, and large quantities of metal 
or slag were thrown out of the vessel. 
These photographs were in very fine focus all through ; the violet line of manganese 
apjDears distinctly divided into three lines. The bands in the yellow and red are 
well focussed, 
Plate G, “Blow” 65. Bods. Vessel No. 2. 
The image of flame on the slit was vertical. The plate used was an Ilford instan¬ 
taneous one stained with cyanine. 
Commencement of “ blow ” . . . . 
1st exposure. 
‘2nd exposure, tbe sodium line persistent 
J5 9? 
99 99 
9 9 99 
3rd 
4tb 
5 th 
Otb ,, 
End of “ blow ” 
99 
99 
9 9 
b. 
m. 
Daratioii of exposurt 
9 
9 
38 
41 
5 minutes 
9 
46 
5 99 
9 
51 
^ 91 
9 
54 
3 „ 
9 
57} 
3i „ 
10 
1 
li 
10 
25- 
The red and green bands were first seen at 9.50 a.m. 
Plate 7. “Blow” 67. Vessel No. 2. 
Position of the image of the flame on the slit of the instrument, diagonal. An 
Tlfo]-d instantaneous plate, not stained, was used. 
li. m. Duration of exposure. 
“ Blow ” commenced.11 36 
1st exposure from 11.36 to. 11 39 3 minutes 
2nd „ .11 48^ 8t „ 
3rd, flame of spiegel-eiseu. 
“Blow” ended . 
11 56 
