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Gentleman's Magazine 1747 p.224
these are placed behind the wheel, as in Fig. 1. the
lever being moved by the pin as abovesaid, immediately moves
a pin of the inside work.
A third sort having a single hand only in the centre, with a
dial in all respects resembling Fig. 1. having four
indexes; the first moves once round in a certain number of
rods, the second in one mile, the third, or centre hand in
20 miles, and the fourth in 500 miles. One of these will
cost but 25 shillings, without a case, varnishing or
silvering; but if varnished, and silvered in all respects as
a clock dial, one guinea and a half. The others are from two
to four guineas, and eight guineas if with bells to strike
the miles and quarters on pulling a string; one of which may
be seen at Mr Neale's, watchmaker in
Leadenhall-street, who has a patent for making
several astronomical machines, &c. and where proposals
at length may be had, or at St John's Gate.
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