by Barkham Burroughs
Available in 217 free installments
Owner:
For instance, if hats cost $17.50 per dozen, remove the decimal point one place to the left, making $1.75, what they should be sold for apiece to gain 20 per cent, on the cost. If they cost $31.00 per dozen, they should be sold at $3.10 apiece, etc.
THE SEVEN WONDERS OF THE WORLD.
Pyramids of Egypt.
Tower, Walls and Terrace Hanging Gardens of Babylon.
Statue of Jupiter Olympus, on the Capitoline Hill, at Rome.
Temple of Diana, at Ephesus.
Pharos, or watch-tower, at Alexandria, Egypt.
Colossus of Rhodes, a statue 105 feet high; overthrown by an earthquake 224 B.C.
Mausoleum at Halicarnassus, a Grecian-Persian city in Asia Minor.
HEAT AND COLD.
Degrees of heat above zero at which substances melt:--Wrought iron, 3,980 degrees; cast iron, 3,479; platinum, 3,080; gold, 2,590; copper, 2,548; steel, 2,500; glass, 2,377; brass, 1,900; silver, 1,250; antimony, 951; zinc, 740; lead, 594; tin, 421; arsenic, 365; sulphur, 226; beeswax, 151; gutta percha, 145; tallow, 97; lard, 95; pitch, 91; ice, 33. Degrees of heat above zero at which substances boil:--Ether, 98 degrees; alcohol, 173; water, 212; petroleum, 306; linseed oil, 640; blood heat, 98; eggs hatch, 104.
QUANTITY OF SEED TO AN ACRE.
Wheat, 1-1/2 to 2 bu.; rye, 1-1/2 to 2 bu.; oats, 3 bu.; barley, 2 bu.; buckwheat, 1/2 bu.; corn, broadcast, 4 bu.; corn, in drills, 2 to 3 bu.; corn, in hills, 4 to 8 qts.; broom corn, 1/2 bu.; potatoes, 10 to 15 bu.; rutabagas, 3/4 lbs.; millet, 1/4 bu.; clover, white, 4 qts.; clover, red, 8 qts.; timothy, 6 qts.; orchard grass, 2 qts.; red top, 1 to 2 pks.: blue grass, 2 bu,; mixed lawn grass, 1/2 bu.; tobacco, 2 ozs.
SOLUBLE GLASS FOR FLOORS.
Instead of the old-fashioned method of using wax for polishing floors, etc., soluble glass is now employed to great advantage. For this purpose the floor is first well cleaned, and then the cracks well filled up with a cement of water-glass and powdered chalk or gypsum. Afterward, a water-glass of 60 to 65 , of the thickness of syrup, is applied by means of a stiff brush. Any desired color may be imparted to the floor in a second coat of the water-glass, and additional coats are to be given until the requisite polish is obtained. A still higher finish may be given by pummicing off the last layer, and then putting on a coating of oil.
DURABILITY OF A HORSE.
A horse will travel 400 yards in 4-1/2 minutes at a walk, 400 yards in 2 minutes at a trot, and 400 yards in minute at a gallop. The usual work of a horse is taken at 22,500 lbs. raised 1 foot per minute, for 8 hours per day. A horse will carry 250 lbs. 25 miles per day of 8 hours. An average draught-horse will draw 1600 lbs. 23 miles per day on a level road, weight of wagon included. The average weight of a horse is 1000 lbs.; his strength is equal to that of 5 men. In a horse mill moving at 3 feet per second, track 25 feet diameter, he exerts with the machine the power of 4-1/2 horses. The greatest amount a horse can pull in a horizontal line is 900 lbs.; but he can only do this momentarily, in continued exertion, probably half of this is the limit. He attains his growth in 5 years, will live 25, average 16 years. A horse will live 25 days on water, without solid food, 17 days without eating or drinking, but only 5 days on solid food, without drinking.
A cart drawn by horses over an ordinary road will travel 1.1 miles per hour of trip. A 4-horse team will haul from 25 to 30 cubic feet of lime stone at each load. The time expended in loading, unloading, etc., including delavs, averages 35 minutes per trip. The cost of loading and unloading a cart, using a horse cram at the quarry, and unloading by hand, when labor is $1.25 per day, and a horse 75 cents, is 25 cents per perch--24.75 cubic feet. The work done by an animal is greatest when the velocity with which he moves is 1/8 of the greatest with which he can move when not impeded, and the force then exerted .45 of the utmost force the animal can exert at a dead
