GLOSSARY 551 



Carbon disulfide. A liquid which readily turns to a vapor that 



is fatal to insect life. 

 Cereal. Any edible grain. 



Chaff. The inclosing portion of the wheat flower that is re- 

 moved from the grain in threshing. 

 Cheat. An annual grass that is a serious weed in fields of wheat 



and oats. 

 Check-rower. A planter by the use of which corn can be planted 



in checks. See Fig. 88. 

 Chess. See cheat. 

 Chinch bug. An insect attacking corn, wheat, and other plants ; 



it is entirely unlike the household pest of the same name. 

 Chit. The germ or heart of the grain, as in the corn kernel. 

 Chrysalis. The pupal or changing stage of certain insects. 

 Clasps. See auricles. 



Club wheat. A class of wheat plants distinguished by the club- 

 shaped head, which is largest at the upper end. 

 Cockle. An annual weed with large pink flowers. 

 Colletotrichum gossypii. The scientific name of cotton anthrac- 



nose, which is the most common form of boll rot. 

 Compresses. Establishments where bales of cotton are again 



pressed and made denser and smaller. 

 Convolvulacece. The name of the family to which the sweet 



potato belongs. 



Copper sulf ate. A chemical combination of copper, sulfur, and oxy- 

 gen useful for destroying the germs of many plant diseases. 

 Corn binder or harvester. See pp. 198 and 199. 

 Corn blades. See p. 99. 

 Corn stover. See p. 99. 

 Cotton, absorbent. Cotton fiber so prepared by chemicals as 



to be able to absorb much water ; absorbent cotton is largely 



used in medicine and surgery. 

 Cotton caterpillar. A caterpillar formerly very destructive to 



the leaves of cotton; it was often inaccurately called the 



army worm. 

 Cotton-seed meal. The meal made from cotton seed after the 



oil is pressed out. 

 Cotton "square." The young bud of the cotton flower, with its 



three surroundings leafy bracts. 

 Coulter, rolling. A revolving disk attached to the beam of a 



plow in order to cut the soil or the vegetation on it. See 



Fig. 195. 

 Cowpeas. A soil-improving forage plant, often called "peas," 



or "field peas." 

 Crease. The depression or furrow on one side of a grain of wheat 



or rye. 



