

MACIIINK i>i:\\\ Q 



/r*M//i/ion /' I r'-' " 



t hrvmls involves 



seldom adopted by engineers for working drawing. Koran 

 explanation of the method see the author's Text-lmok on 

 ;i-al Solid Geometry, Part II.. problem 1 "!. A m<-thod 

 n.Mi adopted cm \v.. r ki: 0WB in li 



here tin- thin lines represent tin- j.i bhc tlii.-k lim-s 



the roots of the threads. In tiu: l' ; -li'-wn :i m.n coinj. !< 

 method. The simplest method is illustrated by figs. 10, 11, 

 .ud li. 



II- ! !.Tt.-.l lines an- drawn parallel to Hi- r tli. 



as far as it extends, and at a distance from one m 

 to the diameter of the screw at the bottom of the 

 thread 



Forms of Nuts. The most common fonn of nut i- 

 hexagonal shown in figs. 10, l:. 1 I. l.">. and K b to i\\\< 



comes the square nut shown in fig. 1 J. The method of drawing 

 these nuts will le understood by reference to the li. 

 Bmall circles indicat !>. and tin- inclined lines passing 



through tin-in the radii of the curves which repi 



red or bevelletl edge of the nut. In all the li-ui 



