C I 
For thispurpoftjhc wifties^That the Obfcrvations may 
fce made every whejre about the fame time, cfpccially, 
about the Equinoxes and the Summer Solflice. That the 
Meridian line be taken by Azimouths , as one of the bcft 
ways. That every Obfervation be made at lead with two 
Needles 5 and that thefe j^eedles be neither too little, nor 
too great 3 he having frequently experienced thedeceit- 
fulnefsof both extremes. Concluding with a Caution^that 
the Oblejvations be made upon an exa£i: kvel. 
It is intended, that the Tranf actions for the 
next Month, (hall come forth about the end 
of the Term. 
LONDON: 
Printed for Henry Hnnt^ Operator to the Royal Society. 
And Sold by him at the Repofttory in Grejham College : 
By jf. Rogers at the Bible in Wejimnjier-H^ll^ and by 
J. Smith at the trim es- Arms in St. Pauls^ChHrch' 
Tard. 
E R R ATA, 
fAg'4- L^r. pnri^ed. lio.r. waUm. p p.Ls.dde 4«^. p.ij.l.go.r^ 
ismre. ^,i6.l'j.r,i)telulfit, li^.r. pofl ii.Farttw, li^^r, aliquot. J. 2©. 
T.ptrnox. Kgi.fori.r/ p.17.1.1. for i. r' I.8.for 1800', r.i8c 30' 1. 10. for 
a505o'r.25o' J.2o.for § aS.r. §028 '1.25.for 491.4^. 1.25.r.m'iVm.J.29. 
T.utut. p.i8,l2,r.reh'quos. I los. magi] que, li^s.jc. (or in,r. a. l.sc.for rfjr.cf. 
1.22.for,w.tf. p.3p.l.2.r. calcuhfque* l2,t,lm* li2,r»fidf(xt(inuA,2<^T»^ 
