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The moon completes its cycle of change on the average in 29-1/2 days. It was used by every man to mark the passage of the year, and its periods from new moon to new moon were called, as in our language, "months" or "moons," and divided into quarters.
A. When the vacuum pan was exhausted by the pumps without any boiling being carried on in the pan, but only a little cold water being let into it, and also into the pumps to enable them to act in their best manner, it was found that whereas with the old pump a vacuum of 114 on the sugar boiler's gauge could be readily obtained, equal to about 29-1/2 inches of mercury, the lowest that could possibly be got with the new horizontal pump was 122 degrees of the sugar boiler's gauge, or 29 inches of mercury, and to get that the engine must not go faster than 10 or 12 strokes per minute.
This, in its turn, was surpassed by two of respectively 29-1/2 and 30 inches, sent by Gautier of Paris to Nice, and by Alvan Clark to Pulkowa; and an object-glass, three feet in diameter, was in 1886 successfully turned out by the latter firm for the Lick Observatory in California.
Cooke, of York, made an object-glass, 25-inch diameter, for Newall, of Gateshead, which has done splendid work at Cambridge. We have the Washington 26-inch by Clark, the Vienna 27-inch by Grubb, the Nice 29-1/2-inch by Gautier, the Pulkowa 30-inch by Clark.
The principal seam in the anthracite district of central Pennsylvania, which extends for about 650 miles along the left bank of the Susquehanna, is known as the "Mammoth" vein, and is 29-1/2 feet thick at Wilkesbarre, whilst at other places it attains to, and even exceeds, 60 feet.
The blonde Phoebe, more humane, graciously allows herself to be seen in her modest grace; she is gentle to the eye, not ambitious, and yet she sometimes eclipses her brother the radiant Apollo, without ever being eclipsed by him. The Mahommedans understood what gratitude they owed to this faithful friend of the earth, and they ruled their months at 29-1/2 days on her revolution.
Read the Deferred only." "27-27-1/4, no change." "Another week." "29-1/2-30, rise 5/8." "Another." "31-1/2-32-1/2, rise 1." "Very good. Now on Tuesday the twenty-seventh November." "31-7/8-32-3/4, rise 1/2." "Yes. The next day." "24-1/2-23-1/2, fall 9." "Quite so, Parkinson. There had been an accident, you see." "Yes, sir. Very unpleasant accident.
Masts of 26 inches diameter, 28 yards long, £25. Masts of 18 inches diameter, 23 yards long, £10. Yards of 25 inches diameter, 35 yards long, £52. Yards of 23 inches diameter, 32 yards long, £40. Yards of 21 inches diameter, 29-1/2 yards long, £20. Yards of 14 inches diameter, 22 yards long, £4.16. Bowsprits 38 inches diameter, 25 yards long, £42.10.
An American naval dirigible a short time after the armistice made a flight from New York to Key West, 1,200 miles, at 40 miles an hour, for 29-1/2 hours, with one stop at Hampton Roads.
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