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Ristr^gcmmetry he divides into 6 parts : The i»t delivers the 
Canon of Siaes, Tangents and Secants ; the 2d explains the nature of 
Logarithms- the '^^^i and teach to refolve Reftilinear and Spheri- 
cal Triangles 3 the 5 th and 6^^ confider Rcftangular and Obliquan- 
gular Spherical Triangles. 
His PraSiical Geometry confiftsof4 parts : The 1« treats of the 
Menfuration of Lines, both ftraight and curve, acceffiblcaod inac- 
cefljblo ; the 2^ and 3d, of the Meafure of Surfaces ; the 41*», of that 
of Solids. 
His ikffri&^^/^r^i contain 6 Books:In the i«,hecftablilhesand ex- 
plains the nioft Univerfa! Principle of Motion ; in the 2d,he applies 
thac Principle to the FifiJ? ^/,as in the 3d hedoesittothe Axisinpe- 
ritrochioi ln the 4th,he demonftrates the power of the 7'rochlea\\n the 
S^hjOf the Qchlea , in the 6^^,ofthe where he takes occafion 
to difcoiirfe Percujpon, 
His Staucks are comprehended in 7 Books ; whereof the istefta- 
bliflies the Equipoifeof the Elements, and explodes the Fear of a 
" Vacuum-^thc 2^ treats of the accelerated Motion of Heavy bodies^the 
♦ gd^of Inclined Plans, and Pendulums ; the4th,ofthedoarine ofE- 
quiponderant bodies; the s^K6^\md yth^of the Center of Gravity, 
of Superficies*s,and Solids. 
In his Geography.hcconCideTS the Figure of the Earth,afligns it its 
place, inveftigates its Circumference and other dimenfions ; diftin- 
guiflies the number of the Zones,and thefeveral Climats; enquires 
into the Heighth of Hills and the Depth of Mines ; and adds divers 
particulars relating ro the Ocean,Rivers,Fountains,and Lakes. 
In his Treatife of Magnetifm, he fir/l fees down the various Ex- 
periments made of the Attraftive, Diredive, and Communicative 
power of the Loadftone ; and as he infers thence feveral Conclufi- 
ons, fo he deduces feveral Pradices from it. He intimates,amongft 
very many other particulars, that, if the Authority of the H.Scrip- 
tures did not hinder, the confideration of the Vertueof theMagnec 
would add much of probability to the Copeymca^SydGin, 
Proceeding to his ArchheciHre chili he difcourfes of the known 
Five Orders^znd annexes to it a Treatife of ordimxy Carpentry. 
In the fecond Tome are contained thefeTreatifes,'z//2j.of thcScdiion 
ofStones^of Architcfture Military,ofHydrofl:aticks, Fountains and 
Rivers, Hydraulicks, Navigation, Opticks, Perfpedive, Catop- 
tricks, and Dioprricks. 
The Treatife of the Section of Stones is divided into 4 Books, 
•i^hereof tl:e firft treats de Compluviatii feu Cjlindricu Formcibu^i^ the 
