[ 74 ] 
What Mercator’s thoughts were upon this matter 
when he formed his univerfal map, I know not, as 
he has left us no account thereof; but what Wright’s 
were, he has very plainly told us in his aforefaid 
book ; and whether his primary conceptions, and 
preparative modulus, do not only take in the whole, 
but alfo the very manner, of Mr. Weft’s conftruCtion, 
will better appear upon a due companion of their 
refpeCtive methods, which I fhall beg leave here to 
introduce in their own words. 
Mr. West’s Proposition. 
“ If a rectangular piece of paper be turned into 
the form of a right cylindrical tube, and a fphere 
“ be infcribed therein, fo as that the axes of the 
“ fphere and cylinder do coincide, or that the equa- 
“ tor be the line of contact between the faid tube 
“ and fphere, and all the points of the fpheriG fur- 
<c face be projected or transferred to the concave fur- 
<f face of the tube, by right lines proceeding from 
“ the center of the fphere, and terminating in the 
“ faid concave furface of the tube: And then, if 
“ the paper be opened, and ftretched upon a plane, 
<c it will prefent a chart, in which the meridians, 
“ parallels of latitude, and rhumbs are all truly and 
“ geometrically projected in right lines”. 
In Wright’s Correction of errors, reprinted by Mox- 
on in 1 6 57, not having the original edition by me, 
in Chap. 2. we have the following account — 
“ Whereas the fpaces betwixt the parallels fhould in- 
“ creafe 
