COLLECTIONS OF FACTS. 287 



tilled water, weighed in air at 62°, with the barometer at 

 30 inches. Two gallons are equal to a peck, eight to a 

 bushel, and eight bushels to a quarter. 



Heaped measure, per bushel, is 2,8 15J cubic inches 

 clear. 



The Winchester bushel is 18j inches in diameter, and 

 8 inches deep, containing 2,154.42 cubic inches. 



1,000 ounces of rain-water are equal to about 7 J gallons 

 wine measure, or to a cubic foot. 



7 pounds avoirdupois is a gallon of flour. 



A chaldron of coals is 58 1 cubic feet. 



Twelve wine gallons of distilled water, weigh 100 lbs. 

 avoirdupois. 



The imperial dry bushel, when not heaped, is 2,218.192 

 cubic inches ; the peck, 554.548 ; gallon, 277.274, and 

 quart, 69.3185. The bushel is 8 inches deep, and 18.8 

 wide, with a heap 6 inches high. 



A bushel of wheat is 60 lbs., rye, 53 lbs., barley, 47 lbs., 

 oats, 38, peas, 64, beans, 63, clover-seed, 68, rape, 48 lbs. 



A Scotch pint is equal to four English pints. 



A Scotch quart is 208.6 cubic inches. 



There are 545,267,000 cubic yards in a cubic mile. 



INTERESTING FACTS IN CHEMISTRY. 



Chemistry is the study of the effects of heat and mix- 

 ture, with the view of discovering their general and subor- 

 dinate laws, and of improving the useful arts. — Black. 



Whenever chemical action takes place, a real change 

 is produced in the substance operated upon, and its iden- 

 tity is destroyed. If a little powdered chalk (carbonate 

 of lime) be put into a glass of water, the chalk will sink to 

 the bottom of the vessel. Though it should be mixed with 

 the water, if left at rest it will soon subside ; no chemical 

 action has taken place ; therefore the water and the car- 

 bonate of lime both remain unaltered. But if a small quan- 

 tity of diluted sulphuric acid be added to a glass of chalk 

 and water, a violent effervescence will commence the mo- 

 ment they come in contact with each other ; a chemical 

 union of the two substances will be the consequence of this 

 chemical action ; the identity of each substance will be 

 destroyed, and sulphate of lime, or gypsum (a body very 

 different from either of the substances employed) will be 

 produced. 



