Nikola Tesla Books
Books written by or about Nikola Tesla
Lower primary turn. Readings were as follows:
| Current through primary | E.m.f. secondary | Ï |
|---|---|---|
| 30.1 | 11.1 | 880 average three readings |
| Current through secondary | E.m.f. primary | |
| 17.9 | 6.4 | 880 average three readings |
|
From first set readings: Mlower pr. = $! {{11.1 \times 10^{9}} \over {30.1 \times 880}} $! = 419,060 cm. |
From second set readings: Mpr. lower = $! {6.4 \over {17.9 \times 880}} $! = 406,300 cm. |
For two primary turns multiple
| Current through primaries | E.m.f. secondary | Ï |
|---|---|---|
| 29.2 | 11.25 | 880 average three readings |
| Current through secondary | E.m.f. primaries | |
| 17.9 | 6.7 | 880 average three readings |
|
From first set of readings: M2 prim. multiple=437,811 cm |
From latter readings: M2 pr. multiple=425,343 cm |
Colorado Springs
Nov. 3, 1899
Investigation for the purpose of ascertaining the influence of elevation upon the capacity of a conductor connected to a vibrating system as before used, continued:
The coil of 346 turns, No. 10 wire wound on drum 14" diam., 8 feet long was again used. The spark wires were as before No. 26 guttapercha covered, 24 feet long each. The readings were as follows:
| Capacity in primary circuit total | Inductance in primary turns reg. coil+conn. | Length of vertical wire attached to free terminal of excited coil | Analyzing spark on terminals of excited coil |
|---|---|---|---|
| $! {{\left({3 \times 36}\right) - 2} \over 2} $! = 53 bottles = 0.0479 mfd | 7 1/8 + conn. | 45 feet | 3 3/8" |
| 0.0479 mfd | 6 3/8 + " | 36 " | 3 3/8" |
| " | 5 3/4 + " | 27 " | 3 3/8" |
| " | 5 3/16 + " | 18 " | 3 1/4" |
| " | 4 3/8 + " | 9 " | 3 1/8" |
| " | 3 5/8 + " | 0 " | 3 1/8" |
256
November 3
A repeated measurement of the capacity of the vertical wire and the 30" sphere by the method of October 29th but with a new coil L (see October 31st). A new feature is Teslaâs attempt to eliminate the wires of the spark gap, estimating the excitation solely from the streamers.
November 3
He measures the capacitance of the vertical wire and sphere of 30" in diameter again by following the method of Oct. 29 but with new coil L (please see Oct. 31). that he attempts to eliminate the wires of the measuring arc gap and that for pose of finding the resonance he uses the current streamers indication.
