92 GARDEN DESIGN 



which cannot leave minute hairs as cloth or blot- 

 ting paper will. 



The use of compasses for plotting from a survey 

 has been described. A beam compass consisting 

 of a rod of wood fitted with point and adjustable 

 pencil is convenient when the curve to be described 

 is outside the stretch of the metal compass, even 

 with extending bar added. A strip of stout paper 

 and a pin make an efficient substitute. 



The T square is used against the side of the 

 drawing board for parallel lines, and in conjunction 

 with the set squares for drawing right angles. 

 The paper should be arranged so that when a 

 number of parallel lines is required as for a 

 building the T square may be in a position to 

 take them. After a plan has been plotted it often 

 happens that the house is askew on the paper, 

 and it is worth while if the size of the board per- 

 mits to unpin the paper and twist it to bring the 

 lines of the house under the T square, as from it 

 all right angles and paths running direct from the 

 house can be most readily drawn. 



The set squares are for ruling parallel lines by 

 sliding one against the other ; for use in conjunc- 

 tion with the T square for right angles and the 

 other angles they contain. They are wonderfully 

 handy, and with practice they can be used in 

 many ways. Those made of a framework of wood 

 with ebony edges are most serviceable for general 

 purposes. Small celluloid ones are useful for 



