of Salts and Saline Subfiances . 9 
“ of Effects in the vifible World, whereby 
c< we are enabled to forefee what will come 
“ to pafs in the natural Courfe of Things.” 
As there is good Reafon therefore to 
expedt, that the following Experiments 
may conduce fomething towards account¬ 
ing for many Caufes and RfFedts in Nature, 
when duly eonfidered by People of true 
Judgment, to fueh I freely fubmit them ; 
.without pretending any thing more my- 
felf than barely to relate Fadts : but Aiduld 
they ferve no other Purpofe than to pre- 
fent a new Set of Objedts for the Micro- 
fcope, full as wonderful and entertaining as 
any that have ever been yet examined, 
affording by Mixture a Variety almofl: inr 
f nite, eaflly procured, and always ready for 
•Obfervation, there are many I flatter myielf 
to whom they will prove acceptable. And 
I fhall endeavour to aflifl: as much as pof* 
Able the Curiolity of thofe who may be 
inclined to repeat thefe Experiments after 
me, by defcribing in the plained: Terms 
each Circumftance neceflary to be known, 
either previous to, or during the Time of 
Obfervation by the Microfcope, and date 
allure them for their Encouragement, that 
the Trouble is very little, though the Plea- 
fare and Information refulting therefrom is 
great. 
To begin then with the Manner of pre¬ 
paring thefe SubjedU for Obfervation. 
CHAP. 
