C to8$ J 
Ergo $mnes yddil ab ohj^Elo pr dioptras ad octilum frotenfi eidem reEl<& 
lined^vi^' radio akohjeBo per gkbulutp 0' formen Op^QUnfej pimp^ml^ 
lelu quoderatprobandHm* 
NoWjtQ the end that the Reader may the more readily fee the dif- 
ference between this Inftrument, and that of the Learned Scheiner; 
our Author thought fit, hereto fubjoyn a fhort defcription of that 
Scheiner's, which performs the work by C<?;??V^j/, as the Author's 
dgth by P^r^//^/, Ipecies* .1%^^ 
■ * - - 
Defcriptio parallelogrammi Stcreograpbici a ClariffimoMatheraati- 
CO Chrifiofhoro Scheinero excogicati, quo per conum radiofunii, om« 
3iia qusecunque fub afpedum cadunt (ut pluribus apud authorem le- 
gere eft J arte infallibili, di€lo citius, in planum projicipofl'unt, 
eodem fitu, ordine, figura, magnitudine apparcnte quo oculus 
ilia haufit.) 
IN figfir a Tab All* fupermenfam A^CTX bene pUnatamyhon^ontlque 
farallelam^ erige nLdperpendicHlHtn duds trabes LS, "^lyConjm^as lig^ 
no tranfverfo OE ab ameriore^ & alid pmili a fofteriore parte i quivHs 
mponatnr lignum oblongum L F, it am ad arbitrium erigi ac deprimifojjit^ 
in cujfts vertiee infigatur dioptra K, adfpeciernm vifibiliHm receptionem coU 
ligendam, 
Pofiea ad Sftantiam H O tantam^ quant am manus Artificis, ex K eX' 
tenta^ ver[us ^arallelogrammum regendum poflulat , excita ad perpendiculam 
fuper tahulam DH ajferem planum HMN Z, qui & parallelograwmum 
fendnlum^ [uftentet:, &pi5iuram depingendamrecipiat. 
Ad punBnm for aminislL cor radiant Jingula punBa objefli oppoJitiYEA09 
lineis YK, iSK, EK, aK, & aliis infinitis ^qud intelligi^ nonexprimi^fo*, 
lent. Per has ergo lineas^ [pedes vifibiles objeBum in foramen^ & trans 
foramentn oculum defer ty qui fi i^objeBumfertur^ & Jingulos ejus radios 
Indicis afice P abfiindit^ c alamo T, imaginem depinget in fuperficietabuU 
H M N Z, fimilem HH imagini.quam planum V X M H, fpeciemvijibilem^ 
fecans^ in aere comprehendit, 
AJfer delineaterius H M N Z mobilis efl faBus in extremitatibns iene^ 
ficio cardinis H , & arcus quadrantalis % k, ut poffit attolli & deprimi^ in* 
dinar i & erigi ^ fecundnm arbitrium Artificis^ & r^i exigent i am. 
N n n n n n 2 Ab^ 
