Touching the last subject of these Dissertations, which is of the Polypus of the Heart, the Author observes, after the recitation of other Writers opinions of the same, that those Excrescences grow and swell for the most part in the Right Ventricle of the Heart sooner than the Left, as they also do about the other veins of the Lungs and Head, from this cause, That the returning masse of the blood is now, by the long continued nutrition of the parts, and by transpiration, depauperated of the spirituous and finer particles, such as are the sulphurous and the red; and whilst it is freshly confounded with the Chile, and other liquors, yet different from the nature of bleu', the white and ragged parts thereof; being precipitated by the contiguity of those unlike parts, are in the large folds of the Hearts right ventricle or auricle, by their ruggedness and little chinks entangled; whence being associated to the like others, passing by, they grow into a greater bulk; as it happens in the generation of the stone in the Pelvis of the kidneys, or in the concretion of Tartar in water Conduits. Bur, befitles this, the Author conceives, that the Pobpx: may be generated

from other cane, since Experience evinces, that it is produced by poisonous potions, by malignant Fevers, caused chiefly by a miafmx or corruption of the Ai', .and by the Plague, and other in{e6tious Dillempers; wherein it happens, that such lleams or juyces are, by the corrupt ferment: of the Vifccu, mixtwith the Blood, which diliutb its texture. This our Author illu{ira:es by some Experiments; whereof oneis, that powring 0yIofSulgbur, oror' Vitriol upon warm bloul. it taifeth i', and by a kind of coction at lail incru-Rates it: Another, that throwing pulverised Allum on it, it renders it black and adull. But that Nilcr, either pulv riled~ or diliblvetl per deli; /ium, attenuatsit, and renders it very Horid; as also doth, sq nz vitre,5'al gemm.e, common yall, tial/lrmoniac, Sulphur, and Hart: horn t which alto for a pretty while hinder the coagulation of the bloud. And dilftourhrrg from hence of the causes, which in the Plague, 8tc.. do coagulate the bloud, either in who'e, or in part by ge refacing Fo! purlf, he faith, that those causes ought to be taken from tbmething analogous to Alluv, Vitriol and ='he like, not from Nite# and Volkzilebsifiqzf, which theuld rather he tiled as remedies by re-fermenting and rendring fluid the bloud.

What Galihro Gali tri undert tok, alter Ie htd di&over'il the Satellite of fitpifer, ofgiving an easy and litre tr .y to ltnow the Le rgilutles by a careful Observation of those Sims; Sgnior Cajni fcems to have now performed more fully than cthert, by com poling certain "nbias, after t 4; years Observaticns matle with exafinelb of the motion of the frid Satellite. These Tables are contain'.l in this B tk; and for the verifying of them, he hath added the Eplxmcridcr of these Stars £:rtl-e year lately elapsed, vi(A. 1668. Whereupon the Agt'tor hath been .ielired from hence, that, il'l-e have calculated any more Epbemenderof them for any following years, he would t blige the Curious by timely publiilting them for observation. Mean time the French Philosophessat Paris have acquainted tis in the youmal der Sc1'u.znr l)fD¢6.l7. 1668. with the Observations made by them, to veriiie the said Epbemar rides, -by a Telelcope of 14 foot;. which maybe offer vice to thoi'e, , that have made observations elsevv here at the same inllant and with the same accurateness, to know the difference a" Longitude between Paris and the Place of their Observation.

Octob. 7. 1668. lror. ro.pom, 51 rn. the first Satellir (call'dP4llz1.r) cntred upon the face of Jupiter.

OH. 8. ls, 8 11. m. The zriSat¢l1ite(call'd June) went our behind gupiter. 03. 9. b. S. 541771. the z.;'. Satellite went out from the face offfupity. off. 16. b. xc. 4. m. the ati. Satellite c-ntred upon theface of fupttrr. 08. zz. ls. ro. 41. m. gg. Rc. the lisli Satellite entred into the shadow ofjupilef, 03, 1.3. b. 8. ga.. rn. the Full Satelite enfrcd upon the face cf yxpiter. Nov. 1 z. ln. ro 40. m. the ad. Satellite entrcd into the (hadow of jfzrpficr No-u. zo.ls z. 38, m.;o.fec. after mi'night§ the 3d Satellite Qc3l1'd7]:4>mi, ~(' ¢;:¢;¢d into time Bvadow of jugitrn

AN