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umbra juft falls upon the globe, its weftern edge at 
the folar horizon touches and leaves the place, where 
the eclipfe is ending on the lowermoft edge of the 
fun at its riftng. Continue turning, and, 4 The 
crofs lines in the centre of the penumbra will go over 
all thofe places of the globe, where the fun is cen- 
trally eclipfed. y. When the eaftern edge of the 
fhadow touches any place of the globe, the eclipfe 
begins there: When the vertical line in the pe- 
numbra comes to any place, then is the greateft 
oblcuration at that place ; and when the weftern 
edge of the penumbra leaves the place, the eclipfe 
there ends; the times of all which are fhewn by 
the index on the hour-circle : And from the begin- 
ning to the end the fhadows ol the concentric circles 
Ihew the number of digits eclipfed at all the inter- 
mediate times. 6. When the eaftern edge of the 
penumbra leaves the globe under the folar horizon, 
the inhabitants fee the fun beginning to be eclipfed 
on his lowermoft edge at its fetting. 7. Where the 
penumbra’s centre leaves the globe, the inhabitants 
fee the fun fet centrally eclipfed. And, laftly, where 
the penumbra is wholly departing from the globe, the 
inhabitants fee the eclipfe ending on the uppermoft 
part of the fun’s edge at the time of its difappearing 
in the horizon. 
References to the figure of the machme. 
,/], the terreftrial globe. B , its axis. C, the folar 
horizon. D> the hour circle, with its index. E y 
the month-plate F y the crooked wire. G, the 
annual index. H, H> H, H , the fquare frame, 
the feales being on the fides hid from the view 
taken 
