(891)
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. But, besides this, the Author conceives, that the Polypus may be generated from other cause, since Experience evinces, that it is produced by poisonous potions, by malignant Fevers, caused chiefly by a miasma or corruption of the Air, and by the Plague, and other infectious Distempers; wherein it happens, that such steams or juyces are, by the corrupt ferments of the Viscera, mixt with the Blood, which disturb its texture. This our Author illustrates by some Experiments; whereof one is, that powring Oyl of Sulphur, or of Vitriol upon warm bloud it raiseth it, and by a kind of coction at last incrustates it: Another, that throwing pulverised Allum on it, it renders it black and adust. But that Niter, either pulverised or dissolved per deliquium, attenuats it, and renders it very florid; as also doth, Aqua vitæ, Sal gemmæ, Common Salt, Sal Armoniac, Sulphur, and Harts horn; which also for a pretty while hinder the coagulation of the bloud. And discoursing from hence of the causes, which in the Plague, &c. do coagulate the bloud, either in whole, or in part by generating Polypus's, he saith, that those causes ought to be taken from something analogous to Allum, Vitriol and the like, not from Nitee and Volatile Spirits, which should rather he used as remedies by re-fermenting and rendring fluid the bloud.
What Galilao Galilai undertook, after he had discover'd the Satellits of Jupiter, of giving an easy and sure way to know the Longitudes by a careful Observation of those Stars; Signior Cassini seems to have now performed more fully than others, by composing certain Tables, after 15 years Observations made with exactness of the motion of the said Satellits. These Tables are contain'd in this Book; and for the verifying of them, he hath added the Ephemerides of those Stars for the year lately elapsed, viz. A. 1668. Whereupon the Author hath been desired from hence, that, if he have calculated any more Ephemerides of them for any following years, he would oblige the Curious by timely publishing them for observation. Mean time the French Philosophers at Paris have acquainted us in the Journal des Scavans of Dec. 17. 1668. with the Observations made by them, to verifie the said Ephemerides, by a Telescope of 14 foot; which maybe of service to those, that have made observations elsewhere at the same instant and with the same accurateness, to know the difference of Longitude between Paris and the Place of their Observation.
Octob. 7. 1668. kor. 10. pom. 32 m. the first Satellit (call'd Pallas) entred upon the face of Jupiter.
Oct. 8. h. 8. 11. m. The 2d Satellite (call'd Juno) went out behind Jupiter.
Oct. 9. h. 8. 54. m the 2d. Satellite went out from the face of Jupiter.
Oct. 16. h. 10. 4. m. the 2d. Satellite entred upon the face of Jupiter.
Oct. 22. h. 10. 41. m. 33. sec. the first Satellite entred into the shadow of Jupiter.
Oct. 23. h. 8. 32. m. the first Satellite entred upon the face of Jupiter.
Nov. 12. h. 10 40. m. the 2d. Satellite entred into the shadow of Jupiter
Nov. 20. h 2. 38. m. 30. sec. after midnight, the 3d Satellite (call'd Themis) entred into the shadow of Jupiter.
