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He compared the mechanism of the eye with that of Porta's "Camera Obscura," but made no attempt to explain how the image formed on the retina is understood by the brain. He went carefully into the question of refraction, the importance of which Tycho had been the first astronomer to recognise, though he only applied it at low altitudes, and had not arrived at a true theory or accurate values.
Below and beyond us lay a great stretch of wooded land, and here it was that we knew we were to meet our reinforcement; here we realized that from this point the adventure might veritably be said to begin. Our spirits rose with the rising day to the blithest altitudes; already we seemed to savor the taste of brisk campaigning; I think we all longed boyishly for action.
Wind from the S. W. we finished Drying our Provisions Some of which was wet and Spoiled, I took equal altitudes and a meridian altitude. Capt. 8 fallow Deer 5 Common & 3 buffalow killed to day, Capt. Lewis Saw a hare & Killed a Rattle Snake in a village of B. squerels The wind from S. W. Dryed our provisions, Some of which was much Damaged.
I obtained, in the night of the 10th of May, a good observation of latitude by alpha of the Southern Cross; the longitude was determined, but with less precision, by the chronometer, taking the altitudes of the two beautiful stars which shine in the feet of the Centaur.
Suddenly in the midst of a piercing blare of brass there was a moment of chaos; then the theme, as if soaring free, lost itself in extraordinary altitudes, borne up by a whirl of violin notes. A crash of cymbals ended everything. When she roused herself at last, Lilla perceived that the concert hall was empty except for the ushers who were turning up the seats.
By the mean of several meridional altitudes of the sun, and a great number of lunar observations, the latitude of Sydney-Bay is 29° 04' 40" south, and its longitude 168° 12' east, of Greenwich. The form of the island is a long square, and it contains about fourteen thousand acres: it is six miles in length and four in breadth. Face of the country.
While camp affairs were being attended to, I set out to climb a mountain for comprehensive views; and before I had reached a height of a thousand feet the rain ceased, and the clouds began to rise from the lower altitudes, slowly lifting their white skirts, and lingering in majestic, wing-shaped masses about the mountains that rise out of the broad, icy sea, the highest of all the white mountains, and the greatest of all the glaciers I had yet seen.
But a pupil need not face such hardships as these. He will be flying for short periods only, and at low altitudes; so if he makes a few wise purchases from among the selection of flying gear now available, and particularly if he equips himself with some good gloves, he should be able to keep sufficiently warm in the air, even if he is going through his training in winter. Showing the 60-h.p.
Also, Livingstone's instruments for observation and taking altitudes may have been in error; and this is very likely to have been the case, subjected as they have been to rough handling during nearly six years of travel. Despite the apparent difficulty of the altitude, there is another strong reason for believing Webb's River, or the Lualaba, to be the Nile.
In proportion as the requirements of aviation became more severe, as the higher altitudes reached made it more exhausting, Guynemer seemed to prolong his flights to the point where overwork and nervous depression compelled him to go away and take a little rest which made him suffer still more.
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