( 45 5 ) 
then, as Radius is to the Cofine of cab 40 De- 
grees, fo is a b 60 Minutes to a c 4 6 Minutes ; 
add 4 6 Minutes to the Zenith Didance C a ; and 
with k, the Point of the Beam-compafs fee at that 
Didance, deferibe the Arch c b e ; then with the 
Zenith Didance of the lad: Obfervation, whofe Cen- 
ter is d , draw the Arch ff ; the Point where it cuts 
the Arch cbe, is the Place where the Ship was lad ; 
and its Didance taken on the Meridian from the 
Equator (hews its Latitude ; the Minutes reckoned 
on the Equator from the Meridian to d (the Time 
of the lad Obfervation) fltevv the Hour, or its Di- 
dance from ix o’ Clock. 
Cafe i. If the Ship had failed from a to /3 or to- 
wards the Sun : The Cofine of the Angle /3 a y, or 
of the Angle between the Ship’s Way and the Sun, 
mud be fubdratded from the Zenith Didance of the 
fird Obfervation. 
N. B. Only the two Arches cbe,ff are to be 
drawn on the Globe, the red being added here, to 
fliew the Reafon of the Condrudtion. 
Cafe 3. To find the Latitude of the fird Placet 
From the Equator, with a pair of Compades, take 
the Didance failed 60 Minutes, and with one Foot 
in the Interledtion of the Arches be, ff, the Place 
found before, put the other in the Arch aaa, the 
Zenith Didance of the fird Obfervation, and in this 
Iudance, on the left Hand of the Azimuth of the 
Sun, this is the Place fought ; and its Didance ta- 
