The PREFACE. 
What kind of mechanical way, and phyfical invention alfo vs therere- 
-quir'd,that might not this way be found out 2? The Invention. of,awayto 
| find the Longitude of places is eafilyperformd, and that to agreatper- — 
fection as isdefir'd, or to a great anaccuratenels as the Latitude of — 
places can be’ found at Sea; and perhaps yet alfo to.a greater certainty — 
then that. has been hitherto Saini: al fhall very fpeedily freely manifeft:to — 
the world — The way of flying in the Air feems principally unpracticable, 
_, by reafon of the want of ftrength iz humane mufcles ; if therefore — 
| that could be fupplid,it were,I think, eafie to make twenty Hoses al to @ 
perform the office of Wings.: What Attempts alfo I have made for the 4 
fupplying that DefeEt, and my fuccelfes therein, which, think, are wholly — 
new,and not inconfiderable, I fhallin another place relate. j 
Tis not unlikely alfo, but that Chymitts, if they followed thia method, 
might find out their fo much fought for Alkahett. What an univerfal 
ahaa; which diffolves all forts of Sulphureous Bodies, Ihave 
difeoverd ( soPiR aa: tik Bein before taken notice of as fee ) Thave 
{hewn in the fixteenth Obfervation. | 
What a prodigious variety of Inventions in Anatomy has this itis | 
Age afforded, even in our own Bodies,in the very Heart, by which we live, 
iad the Brain,which is the feat of our knowledge of other things? witnel3 
_allthe excellent Works of Pecquet,\ Bartholinus, Billius, and many 
others ; and at home, of Dofior Harvy,Dottor Ent,Doftor Willis,Doftor — 
Gliffon, . Fi Ccleftiak Obfervations we have far exceeded all the An- 
tients,even the Chaldeans and Egyptians themfelues, whofe vatt Plains, 
high Towers,and clear Air, did not give them fo great advantages over 
ws, a we have over them by our Glafles. By the help of which, they have 
been very much outdone by the famous Galileo, Hevelius,, Zulichem ; 
and our own Countrymen, Mr. Rook, Dottor Wren, and the great Gang: | 
ment of our Church and Nation,the Lord Bithop of Exeter. Ard to fay 4 
__nomorein Aerial Difcoveries, there has been a wonderful progre/s made 
by the Noble Engine of the moft Uluftrious Mr. Boyle,whom: it becomes 
me to mention with all honour, not only as my particular Patron,but asthe 
_ Patron of Philofophy it. fe/f;. which he every day increates es bis La- 
‘a ae and adorns by bia Example, | 
| 
Salhi sii Sheet iain 
eG. 
