(^9) 
diurns^ concerning Gramtj/ concerning tht Rouftdmfs oS 
FruitSj ftoneSj and divers artificial bodies 3 concerning 
Spritiginefs and TenacHy 5 concerning the Or7^/><?/ of Foun- 
tains 5 concerning the dijjolution of Bodies into Liquors 5 
concerning Filtration^ and the afcent of Juices in Vege- 
tablesj and the life of their Fores. Here an attempt is made 
of folving the ftrange Phenomena of Gr^-^^^r^/^j'^experiments 
are alleged to prove the Expanfion of Glafs by heat^ and 
the Contra&ion of heated-Glafs upoiicooling ^ Des Cartes his 
Hypothejis of colours^ is examined i the cavtfe of Colours^ 
moft likely to the Authors is explained: Reafons are pro- 
ducedj that RefleBion is not neceflary to produce colours^ 
nor a double refraSion i fbme confiderable Hypotlefes- 
are offered^ for the explication of Light by Motion 5 tor 
the producing of all colors by Refraftion 5 for reducing all 
forts of colors 10 two onlyj Tel/ow and Ble^ 5 for making the 
j^ir^ a diffblvent of all Copihuflible Bodies : and for the ex» 
plicating of all the regular figures of Sah., where he alleges 
many notable inftances of the Mathematicks of Nature^ as^ 
having even in thofe things which we account vile/ude and 
ccorfcj fhewed abundance of curiofity and excellent 
metry and Mechanifm, And here he opens a large field for 
inquiries^and propofeth Models for profecuting them, i.By 
making a full colleftion of all the differing kinds of Ge.o-^- 
metric all figured bodies 5 2. By getting with them an exaft 
Hiftory of their places where they are generated or found : 
§. By making ftore of Tryals in Diflblutions and Coa- 
gulations of feverall Cryftallizing Salts 4. By making: 
trials on metalls^ Minerals and ftones^ by diflblving them? 
in feverall Menfiruums^ and Cryftallizing thera^ to fee v/hat 
Figures will arife from thofe feveral compofitums : 5, By 
compounding & coagulating feveral Salts together into the 
fame mafi, to obferve the Figure of that produd : 6. By in» 
quiring the dofenes or rarity of the texture of thofe bodies^ 
by examining their gravity^ and their refraftion, Secy, By 
examining what operations the fire hath upon feveral kinds 
of Salts^ what changes it caufes in their fiigures^Textures^or 
¥ertue.f 
