COUETIS fpripfit ediditque ^ Mzh, Cajfln^ r<»W^ (refradlid- 
Bum) e? rattonihus & E%^perimentis effi confhrmes,. 
But I^miolus.'m sL htQitcmi^ ABrmomm refcrmatte^ hath rau 
fed an Expedation of his Tabiespf Refradion^and que- 
ftions thofe Tables oiC^jftnus i Who,in this Letter, anfwcreth 
his objeaionSjand fliews^hoWjby obfervacions in HeliQ?netro^^^ 
may try whofe Tables are beft* 
jX^Q fecondLm^t is mt^limj to Carlo Rinaldini Profeffor of 
Ma^heiaaticksinthe Univerfuy of P^^?/^>c}aced Augufl.-j 
In it. He fliews fome defect in the wayerof making Experi- 
ments of RefracSioti, prefcribed by ViidiQ^ Des-Cu^es^Riccioli 
and Mam^nuh wl then he defGribes an laftr uaieat of4iia^ own 
invention forthat purpofe/C^r. 
The t/w^^ Letter is in Italian aHo^but without date:Conc8rn. 
ing a book of Dr.MengeU ^ wherein is aTable of Ref rations for 
every deqree of altitude. But Cajfinu^ fbews^that Table of Mengoli 
to be falfe;as being eafily refuted by Experiencc^and grounded 
iipon a wrong fouodation^Moft writers of Dioptricks fiticeZ)^/ 
Carter do agree with him,in aGknowledging a conftant7^«j//flin 
the Sines ot the Angles confidered ip RefracStion.But this Do- 
dor Mengoli^ miftaking thofe AngJ^s^ hath caft away a great 
deal of labour in calculating fo ms(ny RefraftionSj and fo ma- 
king a Table fuH of falie numberi.But CaJJinus hopeth^that Sig» 
nor il/ifwgo/i will review his Principles, and put true ones in 
their room, that fo beginning anew he may reform the Conclu- 
fionSj which he intended to demonftrate. 
I V.Z)r. Richard Sharrock*/ Hiftory of the Propagation and Improvewem of 
VEGET ABLES y hy the Concurrence of Art and Nature. The ZctESd 
tfon much enlarged, Oxford, 1672. in 8°, 
npHis TreatiTe fhewcth the feveral wayesfor the Propagation of 
' I Plants ufually cultivated in as they are increafed by 
Seed, OfF-fets, Suckers, Trouncheons,Cutting,Slips,Laying,Circura- 
pofition Thefevcral wayes of Graftings and Inoculations S as like- 
wife the Methods for improvement and beft culture of Field,Orchard 
and Garden- plants V the means ufed for remedy of Annoyances inci- 
dent to them ; together with the Effed of Nature,and her manner of 
working upon the fevcfal endeavors and^ operations of the Artift. 
Written according to Obfervations made from Experience and Pr?i- 
Sife, Aoiongft the many cdnfiderables in ic,there is an Examination 
o^Sr,ICen,pigify^s reports , and other ftories of great fame. 
Errata in //;^?r/^,8g F^4QgoJ^ i6.and \.2^^(.7eframon ^O^repxion.]p,^ofs.h^^.^nd i.sHifetfotfmft^ 
MNhoN^ Printed forf . J/^rrF^/^printer tothe R&jAlS^ckty^\6l\ 
