Nikola Tesla Books
Books written by or about Nikola Tesla
body of experimenter connected to free end, the spark between the same points. As it was sure that the vibration of coil was too slow for the impressed vibration of approximately 50,000, wire was gradually taken off.
| Number of turns on coil | Longest spark from free end to body of experimenter | Longest spark from watermain end to body of experimenter | Longest spark between the two ends of coil without capacity | Longest spark between the two ends of coil with capacity of experimenter on free end
|
Observation |
|---|---|---|---|---|---|
| I. | II. | III. | IV. | V. | VI. |
| 448 | 1/8" | 5/64" | scarcely visible | scarcely visible | |
| 420 | 1/8"+d | 5/64" | " | " | |
| 392 | 1/8"+d | 5/64" | " | " | |
| 364 | 3/16" | 3/16" | " | " | |
| 336 | 3/16"+d | 3/16" | small spark | small brighter spark | |
| 308 | 1/8" | 3/16" | " | spark larger | |
| 294 | 5/32" | 5/32" | " | livelier spark | |
| 280 | 1/8" | 1/8" | " | " | |
| 266 | 3/32" | 3/32" | " | " |
Indications up to present confirm detrimental effect of capacity. A coil was now added in series. This coil was one used often in New York and was wound on a drum 30" diam. There were about 150 turns total length of wire 1125 feet. To this added the 266 turns of experimental coil giving length of 6.5 feet per turn made length 2100 feet for exp. coil or total 3225 feet. This was very near quarter wave length as it ought to be. Now results were
| I. | II. | III. | IV. | V. | Observ. |
|---|---|---|---|---|---|
| 266+150 | 7/16" | 3/32" | 3/32" | 3/32" lively | |
| Exp, additional coil | |||||
Experiments were now continued with experimental coil alone and showed
| 252 | 1/8" | 1/8" less d | small spark | small spark livelier | Observ. The distributed capacity unmistakably prevents rise on end. |
| 224 | 3/32" bright | 1/16" â | â | â | |
| 196 | 1/16" | 1/16" less d | â | â | |
| 168 | 1/16" | 1/16" â | practically the same. | ||
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