;EFACE. 



IT is now generally reoogni* ,< old-fashioned method 



of teaching machine drawing in very unsatisfactory I 



d an undunflnsioned Male drawing, 

 often of a very elaborate description, is placed before the 



ho is required to copy 



succeeds in making a good copy of the drawing placed before 

 him without learning \'-i v niu.-li about the object irprmntod 

 ml this state of matters is sometimes not much improved 

 presence of the teacher, who is often simply an art 

 matter, knowing nothing about machine design. I . related 

 of one school that a pupil, aft.-r making a copy of a particular 

 drawing, had a discussion with his teacher as to wheth* 

 object represented was a sewing machine or an ekx 



y the publisher of the drawing example in 

 this case did not adopt the precaution which a backward 

 student used at an examination in machine O.M--: : he put on 

 a full title nl -tuation of hi* 



in. i. l,!!i. draw ii.i: is to t* of practical use to any 

 . to understand the form and arrangement 

 "i t!i- parts of a machine from an inspection of suitable draw- 

 ings of them without seeing the parts themselves. Also he 

 to be able to make suitable drawings of a machine or 

 parts of a machine from the machine or th<* parts themselves. 



