We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
24 setting to the parts of the Moon so circumstanced. But as the enlightened edge advances beyond them, their shadows shorten; and at the full moon, no shadows are seen on any part of her surface. The existence of such mountains is corroborated by their appearing as small points or islands of light beyond the extreme edge of the enlightened part, which are their tops, catching the sunbeams, before the intermediate plain, and which, as the light advances, connect themselves with it, and appear as prominences from the general edge. The lunar mountains generally exhibit a volcanic character; the highest has an altitude of about If mile. The Moon completes her revolution round the Earth, that is, she returns to the same place among the stars, in 27 days, 8 hours : but the period which elapses be- tween one new Moon, or conjunction, and another, is 29 days 13 hours; because whilst the Moon is making a revolution round the Earth, the Earth itself will have moved on in its course round the Sun ; so that for the Moon again to arrive at the conjunction, will require two days more. During her revolution she presents to us a constant change in her appearance, which is familliar to all. DIAGEAM XX. Explains the cause of the different phases of the Moon, as they are called. The planets and their moons do not shine by their own light, but by a light reflected from the Sun; therefore, when the Moon is between the Earth and the Sun, or at her conjunction, her illuminated side is wholly turned away from the Earth, and she is not visible; in about two days she begins to appear, a small part of her enlightened face being seen from the Earth. This is what is termed the new moon. As she proceeds in her revolution, more and more of her is seen; and when she has passed through a quarter of her orbit, half of her illuminated side is visible from the Earth. When she arrives on the other