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306
Prof. J. J. Thomson on Cathode Rays.
obtained in this tube are given in the Table under the heading Tube 3.
The results of a series of measurements with these tubes are given in the following Table:—
Gas. | Value of W/Q. | I. | m/e | v. |
Tube 1. | ||||
Air......................... | 4.60×1011 | 230 | .57 ×10-7 | 4.0×109 |
Air......................... | 1.80× 1212 | 350 | .34 ×10-7 | 1.0×1010 |
Air......................... | 6.10×1011 | 230 | .43 ×10-7 | 5.4×109 |
Air......................... | 2.50×1012 | 400 | .32 ×10-7 | 1.2×1010 |
Air......................... | 5.50×1011 | 230 | .48 ×10-7 | 4.8×109 |
Air......................... | 1.00×1012 | 285 | .40 ×10-7 | 7.0×109 |
Air......................... | 1.00×1012 | 285 | .40 ×10-7 | 7.0×109 |
Hydrogen ............. | 6.00×1012 | 205 | .35 ×10-7 | 6.0×109 |
Hydrogen ............. | 2.10×1012 | 460 | .50 ×10-7 | 9.2×109 |
Carbonic acid ....... | 8.40×1011 | 260 | .40 ×10-7 | 7.5×109 |
Carbonic acid ....... | 1.47×1012 | 340 | .40 ×10-7 | 8.5×109 |
Carbonic acid ....... | 3.00×1012 | 480 | .39 ×10-7 | 1.3×1010 |
Tube 2. | ||||
Air......................... | 2.80×1011 | 175 | .53×10-7 | 3.3×109 |
Air......................... | 4.40×1011 | 195 | .47×10-7 | 4.1×109 |
Air......................... | 3.50×1011 | 181 | .47×10-7 | 3.8×109 |
Hydrogen ............. | 2.80×1011 | 175 | .53×10-7 | 3.3×109 |
Air......................... | 2.50×1011 | 160 | .51×10-7 | 3.1×109 |
Carbonic acid ....... | 2.00×1011 | 148 | .54×10-7 | 2.5×109 |
Air......................... | 1.80×1011 | 151 | .63×10-7 | 2.3×109 |
Hydrogen ............. | 2.80×1011 | 175 | .53×10-7 | 3.3×109 |
Hydrogen ............. | 4.40×1011 | 201 | .46×10-7 | 4.4×109 |
Air......................... | 2.50×1011 | 176 | .61×10-7 | 2.8×109 |
Air......................... | 4.20×1011 | 200 | .48×10-7 | 4.1×109 |
Tube 3. | ||||
Air......................... | 2.50×1011 | 220 | .9 ×10-7 | 2.4×109 |
Air......................... | 3.50×1011 | 225 | .7 ×10-7 | 3.2×109 |
Hydrogen ............. | 3.00×1011 | 250 | 1.0 ×10-7 | 2.5×109 |