Page:Philosophical Transactions - Volume 001.djvu/404

 be effected, at least in Animals near of Kin; (As Spaniels and Setting Dogs, Irish Grey-hounds and ordinary Grey-hounds &c?)

16. Whether the Transfusion may be practis'd upon pregnant Bitches, at least at certain times of their gravidation? And what effect it will have upon the Whelps?

There were some other Quæries proposed by the same Author; as, the weighing of the Eminent Animal before the Operation, that (making an abatement for the Effluviums, and for the Excrements, if it voids any) it may appear, how much blood it really loses. To which were annext divers others not so fit to be perused but by Physitians, and therefore here omitted.

A method

Clipses of the Moon are observed for two principal ends; One Astronomical, that by comparing Observations with Calculations, the Theory of the Moons Motion may be perfected, and the Tables thereof reformed: the other, Geographical, that by comparing among themselves the Observations of the same Ecliptick Phases, made in divers places, the Difference of Meridians or Longitudes of those places may be discerned.

The Knowledge of the Eclipse's Quantity and Duration, the Shadows, Curvity, and Inclination, &c. conduce only to the former of these ends. The exact time of the Beginning, Middle, and End of Eclipses, as also in Total ones, the Beginning and End of Total darkness, is useful for both of them.

But because in Observations made by the bare Eye, these times considerably differ from those with a Telescope, and because the Beginning of Eclipses, and the End of Total darkness, are scarce to be observed exactly, even with Glasses (none being able clearly to distinguish between the True Shadow and Penumbra, unless he hath seen, for some time before, the Line, separating them, pass along upon the Surface of the Moon,) and lastly, because in small Rh