2 MAUUM DRAWING UCD 



Do not irrf the pencil, as the lines affo'i mdt with 



very difficult to rub out. 



Drawing- pa| MI f..r \\Mi-k ing drawings may be K< 

 the h<>ai <i i w, I'ut tin- paper for finished drawing! 



or drawings upon which there is to be a large amount of 

 colouring should be stretched upon the board. 



student should get the best instruments he can afford 

 to Imy, and he slr-uid r it her have a few good instrument than 

 a large box of inferior <> 



/. Tin- names and sizes of the sheets of 

 drawing paper are given in the following table : 



to* - 



Demy 2') x 15 



iiuin 22x17 



,1 21 x 19 



Imjicrial . . . 



Atlas 



Double Elephant . .40 

 Antiquarian 2 x 31 



The above sizes must not be taken as exact. In practice 

 they will be found to vary in some cases as much as an in eh. 



Cartridge-paper is made in sheets of various sizes, and also 

 in rolls. 



Hand-made paper is the best, but it is exp- (Jood 



cartridge-paper is quite suitable for ordinary drawings. 



Gen ' . Drawings of most parts of machines will In* 

 found to be Symmetrical about certain lines called . 

 These lines should le drawn first with great care. On a pencil 

 diMwiiii: centie lines should IK? thin continuous lines: in this 

 book they are shown thus . 



After drawini: the centre line of any part the dimensions 

 of that part must be marked off from the centre line, so as to 

 insure that it really is the centre line of that part : thus in 

 making a drawing of a rivet, such as is shown at (a) fig. 1, 

 after drawing the centre line, half the diameter of the rivet 

 would be marked off on each side of that line, in order to 

 determine the lines for the sides of the rivet. 



ing. For inking in drawings the best Indian ink 

 should be used, and not common writing ink. Common ink 



