A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 18
Fig. 9 awkward to hold the compasses by the head, as is usual withinstruments provided with tongue joints. In Fig. 9 isshown a common style of pivot joint. 8. The following suggestions for handling the compassesshould be carefully observed by those who are beginning thesubject of mechanical… … Fig. 10 all beginners is to use both hands for operating the com-passes. This is to be avoided. The student should learnat the start to open and close them with one hand, holdingthem as shown in Fig. 10, with the needle-point leg restingbetween the thumb and fourth finger, and the other legbetween…
