GLOSSARY. 257 



Ptdp t the soft juicy part of fruits and berries. 



Quartz, a simple mineral composed of silex or flint 



Quartzose, containing quartz. 



Quiescent, in a state of quietude or repose. 



Quadruple, four times, four fold. 



Radiate, to shine, to proceed in direct lines from a point, like 



rays of light or heat. 

 Repulsion, the act of repelling or driving off, as in bodies in 



the same electrical state : opposed to attraction. 

 Rarity, the opposite of density, thin, light. 

 Refrangibility, capable of being refracted. 

 Respire, to breath. 



Residual, remaining after a part is taken, sediment which sub- 

 sides from a watery, mixture. 



Reagent, a substance employed to precipitate another from solu- 

 tion, or to detect the presence of some other substance. 

 Rape, a plant of the genus brassica, allied to the cabbage. 

 Ramify, to branch off, divide. 

 Radiation, the act of radiating, throwing off rays. 

 Refrigerating, producing cold. 

 Reverberate, to return, rebound, resound, re-echo. 

 Rays of light, the brilliant luminous lines which proceed or 



radiate from a luminous body. 

 Rarify, to make less dense, to make thin or light. 

 Rarifaction, the process of ratifying, making more porous by 



expansion. 

 Refraction, the act of bending or breaking, diviating from a 



direct course, as in rays of light 

 Receptacle, the end of the flower stalk to which the organs of 



fructification are usually attached. 

 Ramous, branching, having lateral divisions. 

 Ramification, branching, minute division. 

 Ravine, a deep hollow or valley worn out by water. 

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