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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......................... | 4.6 | ×1011230 | .57 ×10-7 | 4 | ×109
Air......................... | 1.8 | × 1212350 | .34 ×10-7 | 1 | ×1010
Air......................... | 6.1 | ×1011230 | .43 ×10-7 | 5.4×109 |
Air......................... | 2.5 | ×1012400 | .32 ×10-7 | 1.2×1010 |
Air......................... | 5.5 | ×1011230 | .48 ×10-7 | 4.8×109 |
Air......................... | 1 | ×1012285 | .4 | ×10-77 | ×109
Air......................... | 1 | ×1012285 | .4 | ×10-77 | ×109
Hydrogen ............. | 6 | ×1012205 | .35 ×10-7 | 6 | ×109
Hydrogen ............. | 2.1 | ×1012460 | .5 | ×10-79.2×109 |
Carbonic acid ....... | 8.4 | ×1011260 | .4 | ×10-77.5×109 |
Carbonic acid ....... | 1.47×1012 | 340 | .4 | ×10-78.5×109 |
Carbonic acid ....... | 3.0 | ×1012480 | .39 ×10-7 | 1.3×1010 |
Tube 2. | ||||
Air......................... | 2.8 | ×1011175 | .53×10-7 | 3.3×109 |
Air......................... | 4.4 | ×1011195 | .47×10-7 | 4.1×109 |
Air......................... | 3.5 | ×1011181 | .47×10-7 | 3.8×109 |
Hydrogen ............. | 2.8 | ×1011175 | .53×10-7 | 3.3×109 |
Air......................... | 2.5 | ×1011160 | .51×10-7 | 3.1×109 |
Carbonic acid ....... | 2 | ×1011148 | .54×10-7 | 2.5×109 |
Air......................... | 1.8 | ×1011151 | .63×10-7 | 2.3×109 |
Hydrogen ............. | 2.8 | ×1011175 | .53×10-7 | 3.3×109 |
Hydrogen ............. | 4.4 | ×1011201 | .46×10-7 | 4.4×109 |
Air......................... | 2.5 | ×1011176 | .61×10-7 | 2.8×109 |
Air......................... | 4.2 | ×1011200 | .48×10-7 | 4.1×109 |
Tube 3. | ||||
Air......................... | 2.5 | ×1011220 | .9 ×10-7 | 2.4×109 |
Air......................... | 3.5 | ×1011225 | .7 ×10-7 | 3.2×109 |
Hydrogen ............. | 3 | ×1011250 | 1.0 ×10-7 | 2.5×109 |