*4

- ''^ex planation of the'Circle s •

froxn A as hrfL ! , ta *e ost ., and ic.t it botli.wayeshave gone dow ^ ? roC€ *d : by half degrees till you

the Canon ^, "ough tbe forty five first whole degrees of

twice 4 1’^ ^«>aU%«ltta e you,have iLibed

Rule.-,! 5 whi!h represent such de“^ eadh Jlalf ° f ^ 1

every 10 th and'rth degrees as here are required J

wltlia longer line and7," 7"^ . S ^iugmckr from the reilter bvm ' c umbered inwards towards the Cen-

appeareth' Afr '• - *° ^° 5 as * n the.figure sufficiently

Rt^hcr' * ,S C,>de ^ you are to pinne down the

yo m Ph isp, e& then Will

1 puere De htted to the uses which now follow.

i-f.

C H A

P- II.

An explanation of the Circles , and lines in the

FrojeBion.

He limbecs the Planisphere reprefenteth the Hob'

zon of the place for which it is made. ; The Dian^"

ter NS'stand .for the Meridian whose; sections, with

the Horizon atN aiiid S, signifie the North and South point 5

of the fame Horizon, and the points W and E , being

a quarter of the Circle distant from the former , doe repre

sent the poiists of East and West, and a Diameter drawn

through them Lnd the Center, is the Prizn.e. vertical or £ a *

and West Aziinuth; The Center poted witli Z , signifies the

Zenith or Pole of the Horizon, Tne Ruler thereforebeing

fixedthereto, shall represent any Azimiuh,‘oV yertical Cirf

all which doe paste through the Zenith point , andtJiP d f

greeSand numbers upon the Horizon, will shew what M 1 'i

muth from North or South , the Ruler beipg fixed at ^

place doth represent. The degrees upon the Ruler denote

the degrees of any, or all the Azimuths, and so perform f ie

office of Almicanters, or parallels of altitude above the H°'rizon.

Within the Projection,it self,the point P uponftheMeb^!^

I signifies the North-Pole , and all the circular lines « iee t tin {? jI ' ■ ' - the>e j