We have all reached the meridian of life, and though feeling few, if any, of the infirmities of age, still, our next move will be in the downhill direction.

In order to secure a chance of retreat, it was desirable as long as possible to keep the Earth between the Astronaut and the Sun; while steering for that point in space where Mars would lie at the moment when, as seen from the centre of the Earth, he would be most nearly opposite the Sun,would cross the meridian at midnight.

Zeelna (Zevelna) returns to the same celestial meridian in thirty hours; but as in this time the starry vault has completed about a rotation and a quarter in the opposite direction, it takes nearly five days to reappear on the same horizon.

after midnight of the Martial meridian on which I lay.

Posidonius, who was nearly a century later, determined the arc of a meridian between Rhodes and Alexandria to be a forty-eighth part of the whole circumference,an enormous calculation, yet a remarkable one in the infancy of astronomical science.

Two other diagrams show the distribution of heat at the time of full-moon, one half of the curve showing the temperatures along the equator from the edge of the disc to the centre, the other along a meridian from this centre to the pole.

" The other suggestion is this: Is it likely that Nature has placed the Fijians exactly in the same meridian with Greenwich, which in some measure may be called the meridian of civilization, for nothing?is it likely that all the solar and cosmic influences which must result from this fact have really left the Fijian in that state of hyper-brutality which you think is proved by his menage?

The prominent mass of land, which stands out from the main, between Cape Naturaliste and Cape Leeuwin, and runs nearly on the meridian for more than fifty miles, seems to have a base of granite, which, at Cape Naturaliste, is said to be stratified.

From this point the country gradually falls to the Ashburton, the bed of which river, in the same meridian as the bay, is about 1600 feet above the sea, and the adjoining ranges not above 2200 feet, or about the same as the country on the Gascoyne, Lyons, and Upper Murchison.

In this defect of vision the curvature of the cornea is greater in one meridian than in another.

However, the exigencies of making a geological and topographical cross section along the 73d meridian through a practically unknown region, and across one of the highest passes in the Andes (17,633 ft.), had delayed the surveying party to such an extent as to make it impossible for them to reach Coropuna before the first of November.

From here along a straight line to the intersection of the tenth parallel of latitude north with the 118th meridian east, and from here following the 118th meridian to the point whence began this demarcation.

BIOT, JEAN BAPTISTE, an eminent French mathematician, astronomer, and physicist, born at Paris; professor of Physics in the College of France; took part in measuring an arc of the meridian along with Arago; made observations on the polarisation of light, and contributed numerous memoirs to scientific journals; wrote works on astronomy (1774-1862).