74 



DEFINITION OF TERMS. 



1.139. It is soluble in alkalies and nitric 

 acid but not in alcohol nor in oil of turpen- 

 tine without peculiar management. 



Correction — In printing, the pointino* 

 out or discovering the faults in a printed 

 sheet, in order to be amended by the com- 

 positor before it be printed off. 



The corrections are placed on the mar- 

 gin of every page, against the line in 

 which the faults are found and there are 

 different characters used to express differ- 

 ent corrections; thus — a mark for dele, to 

 intimate that something, as a point, letter, 

 word <^'C., dashed in that line is to taken 

 out. If any tiling is to be inserted, the 

 place is to be marked ^ and the thing to 

 be inserted, added in the margin. When 

 there are two or more corrections in the 

 same line then they are all separated in the 

 margin by little bars, thus [ . If a space 

 is omitted its place is marked with a caret, 

 and in the margin thus %%. When a letter 

 is inverted, it is expressed in the margin. 

 "When the thing is to be transposed it is di- 

 rected thus, 



Extraordinary scarce ever fail of | attainments. 



scarce ever fail of exciting envy, and in 

 the margin is added tr. If italic charac- 

 ters are to be changed for Roman or vice 



versa, a line is drawn thus under the 



letters and Rom. or Ital. is written in the 

 margin. If a space, or an m or n quadrat 

 stick up and print black it is marked in 

 the margin with a dash thus | . If a word, 

 sentence, or paragraph is entirely omitted, 

 the place is marked with a caret, and in 

 the margin is put the word out. If the 

 letters of a word stand too far asunder, a 

 line is drawn under them and in the mar- 

 gin is put a crooked line or hook thus ._^. 

 There are many other marks, used in cor- 

 recting as cap. for capital /. c. for lower 

 case (^'C. 



Corrosion — In a general sense, the ac- 

 tion of gnawing away by degress, the 

 continuity of the parts of bodies. Acids 

 corrode most natural bodies. 



Crataegrts — Wild service-tree, haw- 

 thorn fyc. There are 23 species all of the 

 tree and shrub kind, hardy and deciduous, 

 those most valuable are the following: 1 

 The oxycanthia, hawthorn or white thorn 

 grows naturally all over Europe. 2 The 

 azarolus or parsely leaved thorn is a na- 

 tive of Italy and south of France. 3 The 

 aria, called the white-bearn tree, is a na- 

 tive of the most cold countries of Europe, 



4 The terminalis, wild service, or maple- 

 leaved service, is a native of England, 

 Germany, Switzerland and Burgundy. 5 

 The cocci nea, or great American hawthorn 

 is a native of Virginia and Canada. 6 

 The crus galli, or cockspur-thorn, is a na- 

 tive of Virginia and Canada. 7. The tomen- 

 tosa woolly-leaved hawthorn, grows to 

 about seven or eight feet high. 8 The 

 viridis, or green-leaved Virginia haw- 

 thorn, has the stem and branches together 

 destitute of thorns. The respective species 

 are all propagated by sowing the seeds. 



Crayon — A name for all colored stones 

 earths, or other minerals used in design- 

 ing or painting in pastel. 



Cube — A regular or solid body, consist- 

 ing of six equal sides or faces, which are 

 squares. 



It is also called a hexahedron, because of 

 its six sides and is the second of the five 

 platonic or regular bodies. 



Cycloid — The cycloid is a curve of such 

 importance, that the honor of its invention 

 has been much contested among mathema- 

 ticians. 



It is a curve generated by the motion of 

 any point in the periphery of a circle, 

 whilst the periphery itself revolves on a 

 right line, till that point which touched the 

 line at the beg-innins; of the motion be 

 brought to touch it again. These are some 

 of the chief properties of the common 

 cycloid. 1 The whole base or right line is 

 equal to the periphery of the generating 

 circle. 2 The semicydoid is double the 

 diameter of the generating circle and the 

 whole cycloid four times the diameter of 

 the generating circle. 3. The area be- 

 tween the cycloid and the right line will be 

 three times the area of the generating cir- 

 cle. 4 The cycloid is the line of quick- 

 est descent of a body descending by the 

 force of its own gravity from one point to 

 another in this cure. 5 A body falls 

 through any arc of an inverted cycloid, 

 whether it be great or small in the same 

 time. Hence, if a pendulum be made to 

 vibrate in the arc of a cycloid, all the vi- 

 brations will be performed in the same time 

 Cylinder — In geometry a solid body 

 supposed to be generated by the rotation 

 of a parallelogram. The section of every 

 cylinder by a plane oblique to its base.is 

 an ellipsis. 



The periphery of a cylinder, multiplied 

 by half the radius will give the contents. 



