PROBLEMS. 



411 



I. To construct plane diogonal Scales. 



Draw any liije, as A B, of any convenient length. Di- 

 vide it into II equal parts.* Complete these into rectan- 

 gles ol* a convenient height, by drawing parallel and per- 

 pendicular lines. Divide the altitude into lo equal parts, 

 if it be. for a decimal sc?le for common numbers, or into 

 12 equal parts, if it be for feet and inches •, and through 

 these points of division draw as many parallel lines, the 

 whole lencrth of the scrde. Then divide the length of the 

 first divlbic, AC h: ; to equal parts, both abover and be.- 

 low •, and ..,.!,, .r , .-■ ;ioints of division by diagonal 

 lines, and the scale is hnished, after being numbered as 

 you please. 



u -t 



PLANE SCALES. fOR rwo Figures. 



U-LJJ_U_:_UJ L.—^.. J-^ 



Ci 



Only 4 parts are here drav/n for want cf room. 



