‘she Use of the Globs s.

That is, the City of London moves a ^°,the Axis of the Earth at the Rate of 1 - sMiles every Minute of Time. But thisfar short of the Velocity of the annualtion about the Sun ; for that is at the ^of 60000 Miles per Hour, or about sMiles each Minute, supposing the Vs ^ter of the annual Orbit to be 82 MiH* 0llS

of Miles (CXLVIII).

TH* 5 **

seV eI a

(CXLVIII) t.'I might here shew how the ^ 0 jfSpherical Triangles are'formed for the Solution 0of these Geographical Problems , as I did Before J^Astronomical ones ; but as the Method is the th 9need not again repeat it. However, to faeil 1 . ( a *

Ideas of the above Definitions, &c. I have a 'ft' c

before mentioned) a Print of each G^ 0 ^' rjeif 9Rationale of the several Methods of solving * r £)'*

th*

of this Sort cannot be well shewn without ,upon the Globe, and a Praxis cum viva voCiDemonstrator. , i0 ^

2. I shall here subjoin a few Things relating ^

Magnitude of the Earth, and the Dimensions 0 ' , tW

veral Parts, together with the Manner of ac< t ll *i eSp!Knowledge thereof. First then, the most na f us ( fd yand certain Method of doing this is, by first .fa 0the Length of a Degree of Latitude in the M ^ 7.any. Place; because if the measure of & ne psonce found, the Earth being supposed- round, . ff otlall the other Measures may easily be deduc

this. „i e ,S^

3. Thus if I take the Height of the Norths g e $ts

Thus it , _ |w< .

in this Place with a very good Quadrant ot ^and then proceed directly Northward or Sout v W