Nikola Tesla Books
Books written by or about Nikola Tesla
| Coil alone | |
| Capacity in primary | Inductance in primary |
| $! {{2 \times 36} \over 2} $! = 36 bottles = 0.0324 mfd | 1 3/8 turns + conn. |
| Coil with vertical wire 50 feet (No. 10) | |
| $! {{2 \times 36} \over 2} $! = 36 bottles = 0.0324 mfd | 8 1/16 turns + conn. |
| Experiments with ball 30" diam. | ||
| Capacity primary circuit | Height of ball from center to ground | Inductance primary |
| $! {{2 \times 36} \over 2} $! = 36 bottles = 0.0324 mfd | 10' 1" | 8 7/8 + conn. |
| " " " | 33' 8" | 9 + conn. |
| " " " | 57' 3" | 9 1/8 + conn. |
from this follows:
When coil was alone the inductance of primary was 1 3/8 turns + conn. = 7121 cm. Hence, taking inductance of coil = 6 x 106 cm, we have similarly to preceding
Cs1 = $! {{0.0324 x 7121} \over {6 \times 10^{6}}} $! mfd or Cs1 = $! {{9 \times 10^{5} \times 0.0324 \times 7121} \over {6 \times 10^{6}}} $! = 34.61 cm, slightly less than found before.
Now in second experiment with wire connected to vibrating system the inductance was 8 1/16 turns + conn. = 25,472 cm. Since the capacity was the same we have as before
Cs2 = $! {25,472 \over 7121} $! Cs1 = 3.577 x 34.61 = 123.7999 cm.
From this follows for capacity of wire alone
Cs2 - Cs1 = 123.7999 - 34.61 = 89.19 cm.
When ball was at a height of 10' 1" the inductance was 8 7/8 turns + conn. = 28,389 cm; in the middle position it was 9 turns + conn. = 28,870 cm, and in the highest position it was 9 + 1/8 turns + conn. = 29,351 cm. From this following values are obtained:
Cs3 = $! {28,389 \over 7121} $! Cs1 = $! {28,389 \over 7121} $! x 34.61 = 3.98666 x 34.61 = 137.9783 cm
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