Nikola Tesla: Colorado Springs Notes, 1899-1900 Page 267

Hence

C'_s1 - C'_s2 = $! {0.0477 \over 0.00604} $! x (0.00005486 - 0.00001116)

= $! {0.0477 \over 0.00604} $! x 0.0000437 mfd, or

C'_s1 - C'_s2 = $! {{9 \times 0.0477 \times 4.37} \over 0.00604} $! centimeters = 310.6 cm.

very nearly the same value.

It is to be expected that the value found with a quicker vibrating system should be smaller since then the structure begins to act not as one condenser but as a series of condensers or distributed capacity, all parts not being charged at the same time.

This method of determining the capacity implies therefore to be quite correct a slow vibration and, furthermore, negligible capacity in the vibrating system itself and also that the body the capacity of which is determined should not be of too great length since this must cause errors.

From reading with coil of 550 turns it follows, since the capacities both in the primary and secondary circuits remained the same, that the inductances in the primary and inductances in the secondary or excited circuit bore the same ratio, that is:

$! {\text{Ind. 8 7/8 turns+ conn.} \over \text{Ind. 3.5 turns + conn.}} $! = $! {\text{Ind. coil 550 turns} \over \text{Ind. coil 344 turns}} $!

Ind. of coil 550 turns was: 18,650,000

Ind. of coil 344 turns was: 6,040,000

Hence $! {\text{Ind. 8 7/8 turns} \over \text{Ind. 3 1/2 turns}} $! = $! {1865 \over 604} $!

This for later comparison.

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