'Sir

With reference to your inquiry for an Induction Coil of medium size, we have coils in stock of medium strength (rather stronger perhaps than those usually made in England) with about 3250 Convolutions. They are arranged with a Tuning Fork on the same board, a platinum wire attached to which dips into a Mercury Cup T piece, & permits a flow of water to pass the Mercury from a Mariotte flask. The Tuning Fork we always supply instead of [the] old hammer arrangement.

The cost of the Coil & Fork complete is £6.10.0.

It could be delivered within 7 days from the date of ordering.

If you found that the convolutions were too few in number, more could easily be added afterwards.

Faithfully Yours,

A.G. Dew-Smith. for the Company.'