( ^86 ) 
" Geometry and Arithmetick, as are needful for ma- 
" king Calculations. What I would oflferas this,Taking 
" for granted that the Earth moves, feTc. You know, 
" that befides the Diurnal and Annual Revolutions, 
" there muft alfo be a Third, to account for that (low 
Motion of the fixed Stars, upon the Poles of the 
Ecliptick, in about z 5000 Years ; which is folved by 
" the dircftion of the Earth's Ax s from one Point to 
another of the Polar Circle. And that diredion be- 
ing nothing but a certain wabble in the Earth's Mo- 
tiori, muft needs make the Noon-lhade of a Perpendi- 
cular not lye always in the fame Line. I would re- 
queft, that this hint might be improved in one of the 
next Tranjailionsy if I were (ure that it were not 
" a Blunder. But if fo, I have this to excufe, that I 
have not made it tedious. / am, Sir ^ your mfi 
humhle Servant, 
Now, this being a new Suggeftion, and which (if 
well grounded) may be of confiderable confequence 
(both as to the Declination of the Magnet ick Needle ^ 
and the Poles Elevation,) and therefore defer ving to be 
well confidered : And, it not being very probable, that 
fo careful a Man as Tkho, and thoft concerned in the 
Church of St. Petronio (mentioned in the Tranfa^lions^ 
Num. 2^\i,)^o\x\d be fo muchmiftaken in the Meridian 
Line: I thought fit to recommend it (as is dcfired) 
to your confideration, and ("thereby) to the Thoughts 
of others. But, if there be ought oF this nature; it 
muft arife from a change of the Terreflrial Poles (here 
on Earth)of the Earths Diurnal Motion ; (not of their 
pointing to this or that of the fixed Stars : ) For, if 
the Poles of this Diurnal Motion remain fixed to the 
fame place on the Earth ; the Meridians (which pafe 
th.'-ough thefe Poles) muft remain the fame. 
Tqwt Humble Servant^ 
JohnWallis. 
VI. An 
