Sint autem A B ^ C D in diverfis Plants 5 if a tAmen ut EG 
froJu^^a , ftt ad reftos angulos vtriqui A B (jrC D: accedant de- 
nique ad fe invicem Corf era » froutofusfmritjfervatatamen ea- 
dem incUnatione & [itu Axium. 
Dico 5 ex revolmone & mmua attritiont Corprum frius fofitg' 
rum exurgere noua corpora Geometrical quorum P & ^l^erunt 
Cylindroidea Hy perbolica aqualia , R. vcro Conoides Hyperbo- 
\\QXxm^ fpccie magmtudwe datum. 
Dem0n[irationemin promptu habcmus , nec nonModulum ipftus 
2d aching y terendis Lentihus Hjperholicis deflinata' quamoptrO" 
fa piBura ^prolixaexplicMione defer ihere^ mihi^ artifici ma- 
gis fuerit mole(lum , quam D^dalo cuivis fagaci ftmilem ad- inve- 
nire, Fojlquam enim expo fit a jam f m prirJcipiaQeometricayfaci- 
le eritconjicere ^ qtiaU fit Infirumcntums nempe ^ tres funt Ta- 
biiU oblongs 3 plan^y v ilida^ Ubiles , fibi invicem impoftta : 
Infima ^ Media ju^incnt incCqualia Capitula ( five Anfts mam- 
fhur (ufiinentes ) alternatim poftta % id po(iulat utriu que mamphu^ 
ris obliquitas q^afi decujfatio : S umm ^ TabuU xqu^lh fuf^t Ca- 
fitula in longu>m T abuU difpofita 5 perforato citimo Capitulo 
m^mphur tranfmittitur. Omitto rotas^rotulasjora^pondera/ochle* 
as ^ reliqua admotnm expeditum& Machlna firmitnUnem nc- 
cejfaria, P pertinet ad infimam Tabulam-j ^admediam-^ Ki 
ad fummam. R ^ Lens e(l vitrea : Modulus Lent em terens 5 F, 
Formula Modidum corrigens 5 qua , du m motu obliquo^ & diver- 
jo a motu tarn Lent is quam Moduli^ fertur^ delet continuo & dete- 
rit 5 quicquid vitii imprimitur in Modulum ex Lentk & Mate- 
ri£ attritiene. 
^are , cum ad o fimplex & fipo:^tanea fin i(la HyperboUci Co- 
V[0\<Xvb genitura ^ ex folis nmpe motibus CircuUrtbf^S'^ cumque 
motus fit duplex varius, creMile efi, Lentes Hyperbolicas ^at 
hijce Frincipiis vel nuUis fere explicandas. 
Some Inquiries Concerning the Szk'Spnngs andthe Way <?/ Salt- 
making at Nantmch in Chefi)ire ; Jnfwerd bj the Learned and 
obferving William Jackfon Dr. of Fhjfick. 
I. T ^ J Hat is the depth of the Salt- fprings^ The depths 
VV are various 3 in fome places not above?, or 4, 
yards. In our Town of Nanuvich^ the Pitt is full 7. yards froai 
the 
