. American engineer and railroad journal . bjects treated being such asthe apprentice is familiar with in connection with his shop work. The first exercise is illustrated in Fig. I. It wll be seen thatthe apprentice is required to use his compass from the very first,and that he must draw this exercise several times until he be-comes somewhat accustomed to the use of his tools. He is alsoexpected to shade the rounded portions, as all drawings whichare made in the Grand Trunk drawing office are shaded thus. Thesecond exercise is for a wrought iron link and lever and also re-quires the use of the
. American engineer and railroad journal . bjects treated being such asthe apprentice is familiar with in connection with his shop work. The first exercise is illustrated in Fig. I. It wll be seen thatthe apprentice is required to use his compass from the very first,and that he must draw this exercise several times until he be-comes somewhat accustomed to the use of his tools. He is alsoexpected to shade the rounded portions, as all drawings whichare made in the Grand Trunk drawing office are shaded thus. Thesecond exercise is for a wrought iron link and lever and also re-quires the use of the compass and dotted or invisible lines: inaddition it requires the use of the 45-degree triangle. The thirdexercise shows three links of a standard chain. The fourth,which is reproduced in Fig. 2. is for a Ij-g-in. bolt, and in addi-tion to the principles already introduced, calls for the drawingof a hexagon and the drawing of threads. The seventh exercise 24 AMERICAN ENGINEER AND RAILROAD JOURNAL. i. ■ i .!■■■■■ .■ fu l ill. i6. *ie Draw the W pin first and after completing the two views of same, drawagain and even a third one, then proceed with 1 pin, which draw severaltimes. FIG. I.—FIRST EXERCISE.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
