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Note: See footnote references to Table 1 at bottom of page 604.
Deflection readings given here are the total deflections minus the deflections due to the cathode rays themselves and the small amount of light present in the room. They are the total deflections minus the “blank” deflections, so are the actual amounts produced by the light from the samples.
Samples furnished by W. S. Andrews, General Electric Company.
Samples of natural calcite from W. P. Headden, Fort Collins, Colorado.
from Ingleside Quarry, Ingleside, Colorado.
from Alford-Maxfield Quarry, near Fort Collins, Colorado.
from Limestone Quar y, Murke, Wyoming.
Samples of commercial products, from different companies.
Table 2
Comparison of ortho and meta silicates
Sensitizing agent
Amount gram per 2 g ZnO
Deflection in mm ZnSiO4
Deflection in mm ZnSiO3
Nd2O3
.01
28
35
Nd2O3
.005
25
29
Nd2O3
.001
33
37
Tl(NO3)3
.01
46
52
Tl(NO3)3
.005
30
34
Tl(NO3)3
.001
40
44
Table 3
Relation of heating and mixing
A
Sensitizer
Deflections in mm
Mix heat
Heat mix
Grind heat
Heat grind
CeO2
63
53
45
34
Nd2O3
66
63
50
44
B
Sensitizer
Deflections in mm
Sample
Sample ground
Reheated
CeO2
56
40
58
Nd2O3
53
36
54
Table 4
Phosphorescence of CaS and ZnS when excited by lights of different colors
Arcs were all operated by 110 volts direct current.
Electric light was a tungsten filament, nitrogen filled bulb, candle power 50 w and voltage 110.
Mercury vapor lamp was in a quartz tube.
Note: See footnote references to Table 1 at bottom of page 604.
Deflection readings given here are the total deflections minus the deflections due to the cathode rays themselves and the small amount of light present in the room. They are the total deflections minus the “blank” deflections, so are the actual amounts produced by the light from the samples.
Samples furnished by W. S. Andrews, General Electric Company.
Samples of natural calcite from W. P. Headden, Fort Collins, Colorado.
from Ingleside Quarry, Ingleside, Colorado.
from Alford-Maxfield Quarry, near Fort Collins, Colorado.
from Limestone Quar y, Murke, Wyoming.
Samples of commercial products, from different companies.
Table 2
Comparison of ortho and meta silicates
Sensitizing agent
Amount gram per 2 g ZnO
Deflection in mm ZnSiO4
Deflection in mm ZnSiO3
Nd2O3
.01
28
35
Nd2O3
.005
25
29
Nd2O3
.001
33
37
Tl(NO3)3
.01
46
52
Tl(NO3)3
.005
30
34
Tl(NO3)3
.001
40
44
Table 3
Relation of heating and mixing
A
Sensitizer
Deflections in mm
Mix heat
Heat mix
Grind heat
Heat grind
CeO2
63
53
45
34
Nd2O3
66
63
50
44
B
Sensitizer
Deflections in mm
Sample
Sample ground
Reheated
CeO2
56
40
58
Nd2O3
53
36
54
Table 4
Phosphorescence of CaS and ZnS when excited by lights of different colors
Arcs were all operated by 110 volts direct current.
Electric light was a tungsten filament, nitrogen filled bulb, candle power 50 w and voltage 110.
Mercury vapor lamp was in a quartz tube.