<9$i) 
Smi are beft- taken,' When it is sbontBa/i Wefi, harK 
been already intimated. But note, that in Sailing North and 
Setith yon make not the Obfervations at the Suns rifing and 
fectirig 5 but at its being dus Eail and Wtft« 
But you may, efpecially in fuch Quarters, as !ye fm North 
or Spmh , yea and wherever you will , pot the Rule herepre- 
fcribed in pradlife , by taking 2. equd Altitudes of fome known 
Starry that rifeth high above the Hori.Eon. For you fliali 
thence, according to the mention d Rule, know at what time 
by the Vyatches the Starr hath been in the South 5 and fo the 
Might Afcenftpn oi that Stdrr being known , as alfo the Righr 
Alcenfton oi tht SuHy you may thence eafiiy calculate, whac^ 
imQ it then I Which being compared with the time of the 
Watphes^ as before, lhall give tht Lmgitude the place 
whereyouwcre, when you had the Starr in the Meridian. 
If the Watches, that have gone exaiily for a while, fliould 
come to differ from one another (as in length of time it may 
well happen^ that the one or the other failea minute, more 
Of lefs -, ) in that cafe it will be befl: to reckon by thatjwhicfi 
goes fafteft 5 unlefs you perceive an apparent caufe , why it goes 
top faft^ feeing it is not fo eafie for theft penduium- Watches 
£0 move^ faftcr than at firft, as it is to goe flower. For, the 
Wire, on whidLthe Pendulum hdsigs^. may perhaps by the 
violent agitation%f the Ship come to ftrccch a little ^ but ic 
cannot grow fhorter 5 and the little Weight of the Fendukm 
perhaps flip downwards y but .cannot get up higher. 
When you get fight of any known Country , Ifland or Coaft,' 
be fure to note the Longitude thtxtoi as exadly as you can by 
the help of the Roles here prefcribed. J/>/?-, thereby to cox" 
met, ihQ Sea- M4fs ^ zkti that the Longitude of a place fliali 
have been found at divers times to be the fame , fo that yoi 
doubt no more of it* For all Mafps are very defective as to the 
Scituation of Places in refped of Maflmd Wefi ^ chiefly where 
Seas are interpofd. Secondly , to be able always to know in 
the profeeutioa of your lourney, howfi^rr you have falFd from 
' ' any/ 
