During the conversion of ice into water one hundred and forty degrees of Food for 

 heat are absorbed. Plants 



Water, when converted into steam, increases in bulk eighteen hundred ]"^ 

 times. 



In one second of time in one beat of the pendulum of a clock light 

 travels two hundred thousand miles. Were a cannon ball shot toward the 

 sun, and were it to maintain full speed, it would be twenty years in reaching 

 it and yet light travels through this space in seven or eight minutes. 



Strange as it may appear, a ball of a ton weight and another of the same 

 material of an ounce weight, falling from any height will reach the ground 

 at the same time. 



The heat does not increase as we rise above the earth nearer to the sun 

 but decreases rapidly until, beyond the regions of the atmosphere, in void, it 

 is estimated that the cold is about seventy degrees below zero. The line of 

 perpetual frost at the equator is 15,000 feet altitude; 13,000 feet between 

 the tropics; and 9,000 to 4,000 between the latitudes of forty degrees and 

 forty-nine degrees. 



At a depth of forty-five feet under ground, the temperature of the earth 

 is uniform throughout the year. 



In summer time, the season of ripening moves northward at the rate of 

 about ten miles a day. 



The human ear is so extremely sensitive that it can hear a sound that 

 lasts only the twenty-four thousandth part of a second. Deaf persons have 

 sometimes conversed together through rods of wood held between their teeth, 

 or held to their throat or breast. 



The ordinary pressure of the atmosphere on the surface of the earth is 

 two thousand one hundred and sixty-eight pounds to each square foot, or 

 fifteen pounds to each square inch ; equal to thirty perpendicular inches of 

 mercury, or thirty-four and a half feet of water. 



Sound travels at the rate of one thousand one hundred and forty-two feet 

 per second about thirteen miles in a minute. So that if we hear a clap of 

 thunder half a minute after the flash, we may calculate that the discharge of 

 electricity is six and a half miles off. 



Lightning can be seen by reflection at the distance of two hundred miles. 



The explosive force of closely confined gunpowder is six and a half tons 

 to the square inch. 



How to Preserve Eggs. 



To each pailful of water, add two pints of fresh slacked lime and one pint 

 of common salt; mix well. Fill your barrel half full with this fluid, put your 

 eggs down in it any time after June, and they will keep two years, if desired. 



Estimating Measures. 



A pint of water weighs nearly i pound, and is equal to about 27 cubic 

 inches, or a square box 3 inches long, 3 inches wide and 3 inches deep. 



A quart of water weighs nearly 2 pounds, and is equal to a square box of 

 about 4 by 4 inches and 3^2 inches deep. 



