^ ( 367 ) 
19. And yet I would gladly bellow more pains to fiod odC 
all the Arts requifite to determine the nature of all fubterra- 
neous fleams : This is like to be all the means we have, to 
fearchout the nature and variety of all thofe materials , which 
fluff up this Terraqueous Globe, 7000 miles in Diametcre 
For, by our deepeft mines on land, and by all the gulfs and 
whirl-pools in the Seas, we have not origineio this day, en- 
tred deeper through the Mineral and Rocky hoopes^ ribbs, and 
cruilsof the earth, as I think, than two or three miles from the 
plane; whichin comparifonof 7000 miles is lefs than the Ihell 
aad catii of an Egg compared with the liquors and fubftance therein 
contained. 
Sir, At next fitting down to fcribble, God willing, I intend to 
give you fome Experimental Demonftrations of the frequent 
and almofl perpetual changes of the Surface of the whole Globe, 
or Mafs of Earth, to a greater depth, than many are wilting to 
imagine J as appendant to this loos draught, and of importance 
in Agriculture, and affording freOi enquiries, and a confider- 
able task for future Geographers* But you muft exped no 
other language, or compofure , than what conies firft to a run- 
ning pen, and agrees with rufticities ; for which I have more 
affcftions , than fpare minuter to offer t@ you« 
Your hy^^bie ftrvanf 
J, Beak. 
Mr, Fimfttad^ 
