Page:Philosophical Transactions - Volume 001.djvu/253

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parts dispersed up and down in it; by the Wheel Barometer, heavy.

B. Another Scheme, which I drew from my Observation, about 10. minutes after, the same morning. Both these were observed with a very deep Eye-glass.

C. March 10d 00h 20m in the morning: the Air heavy and inflective. Use was made of a shallow or ordinary Charge.

D. March 10d 3h 00m in the Morning; the Air very heavy and inflective, which made it glare and radiate, and be more confused, than about 3. hours before. A shallow Charge.

E. March 21d 91/2h post merid; the Air light (in weight) and clear, without inflecting parts; the Face appear'd most distinctly of this Forme. A shallow Charge.

F. March 21d 113/4h post merid; the Air continuing very light and clear, without inflecting vapours. A shallow Charge.

G. March 21d 81/2h post mer. the Air clear, with very few inflecting veins in it, and indifferent light. A shallow Charge.

H. March 23d 91/2h post mer. the Air pretty light but moist, and somewhat thick and hazy, but seem'd to have but few veins, or inflecting parts.

I. March 28d 3h p. m. much the same kind of Air with that of March 23, light, moist, and a little hazy, with some very few veins.

Observations

Made in Italy, confirming the former, and withall fixing the Period of the Revolution of Mars.

These Observations we shall summarily present the Curious in these parts with, as they were lately presented (by Letter from his Excellency the Ambassadour of Venice, now residing at the Court of France) to the Royal Society, in some printed sheets of Paper, entituled, MARTIS, circa Axem Proprium Revolubilis, Observationes, BONONIÆ à JO. DOMINICO CASSINO habitæ; come to hand June 3. 1666.

In these Papers the Excellent Cassini affirms;

1 . That with a Telescope of 24. Palmes, or of about 16 Foot, wrought after S. Campani's way, he began to observe February 6. 1666 (st.n.) in the morning, and saw two dark Spots in the first Hace of Mars.

2. That