FACTS ABOUT PRINTING AND BOOK- 

 MAKING. 



The following are the different styles of type ordinarily 

 used in book-printing : 



PICA. 



Springs are weakened by use, but recover their 

 strength if laid by. 



SMALL PICA. 



Metals have five degrees of lustre splendent, shining, 

 glistening, glimmering, and dull. 



LONG PRIMER. 



The hardness of metals is as follows : Iron, Platinum, Copper, 

 Silver, Gold, Tin, Lead. 



BOURGEOIS. 

 A fall of 1-10 of an inch a mile will produce a current in rivers. 



BREVIER. 

 Melted snow produces about 1-8 of its bulk of water. 



MINION. 

 Silica is the basis of the mineral world, and carbon of the organized. 



NONPAREIL. 



Sound passes in water at a velocity of 4708 feet per second, and in air 1100 feet, at a tem- 

 perature of 33. 



AGATE. 

 At the depth, of 45 feet, the temperature of the earth is uniform throughout the year. 



PEARL. 



The weight of a cubic foot of air is 527.04 grains, or 1 205 ounces, avoirdupoii. 



NOTE. Diamond is smaller than pearl Emerald still smaller. 



