M Ingenious propofal for a new fort f/Maps o/Conn- 
trys, togttmr with Tables of Sands and Claysr 
fuch chiefly as arejound in the North parts cf l^ng- 
hndy drawmap about I o years fince^ and delivered 
to the Royal Society Mar. 12. 1683, h ^^^^ 
Learned Martin Lifter M. V. 
WE fliall then be better able to judge of the make 
of the Earthyd.xidi oi many Phienomena belonging 
thereto, when we have well and duely examined 
it, as far as human art can pollibly reach, beginning from 
the outfide downwards. As for the more inward and Cen-- 
tral parts thereof, I think we fhall never be able to con- 
fute Gilbert's opinion thereof, who will, not without Rea« 
Ion, have it altogether Iron "^. And for this purpofeit 
were advifable, that ^ Soil ox Mineral Map, as I may call 
it, weredevifed. The fame Map of England may, for 
want of abetter, atprefent ferve the Turn. It might 
be diitinguifhtinto fow/imWjWith the i^^V^r and fome of 
the noted Towns put in. The Soil might either be co- 
loured, by variety of Lines, or Etchings j but the great 
caremuftbe, very exactly to note upon the M^/?, where 
fuch and fuch Soiles are bounded. As for example in 
Yorkjbire ( i. ) The rfl^t^Wj-gChaulk, Flint, and Pyrites, ^c^ 
(2..)Blac\ /w<?<?r^ ; Moores, Sandftone,^^. (3.) Holder^ 
nefs; Boggy, Turf, Clay, Sand,^^r. ( 4,.) Wejiern Moun-^ 
tains*, Moores, Sand-ftone, Coal, Iron-ftone, Lead Ore^ 
Sand, Clay, Nottingham jhir e^mofdy Gravel Pebble;, 
Clay, Sand-ftone, Hall- play fter^ or Gyplum, &c. Now 
if it were noted, how far thele extended, andxhe limits of 
each Soil appeared upon z Map, fomething more might 
*'DQMagn, Lib. i. Cap. 17. Tellm m inter iorihs ^aytUns magnetic am 
komogsmcam naturam habct. 
be 
