j66 OF THE LATITUDE AND LONGITUDE. i

and several time-pieces were accordingly exe-cuted by them, which were found to merit thehighest commendations. Messrs Arnold, Kendall,Mudge, and other eminent English artists, havealso made great improvements in this useful art;and furnished a number of excellent chronome-ters, which are now held in universal esteem.By a new acs, however, which was made in theyear 1774, the greatest reward which can nowbe obtained for the discovery of the longitude,either by this, or any other method, is 10,0001.and all time-pieces, which are offered for thispurpose, in future, are enjoined a more rigoroustrial.

If a watch, or time-keeper, like those above-mentioned cannot be procured, we have anothermethod for finding the longitude of places,afforded us by eclipses of the moon. For sincethe moon has no light but what she receivesfrom the fun, and the earth at thole timesis interposed between them, she must, of course,be deprived of that light, and become obscure.And as this obscurity is always real, and arise?from her being an opaque body, it is plain thatthe phænomenon may be seen from every partof the earth, where the moon is above thehorizon of the place at the time the eclipsehappens. This, therefore, is precisely the thingwanted; since any appearance that can be ob-served at two distant places, at the fame moment

of