104 



HOPS. 



Another system of marking off (equilateral) triangles is 

 shown in Pig. 23. 



Setting out the square and rectangular systems (Figs. 20 

 and 21) is a very simple matter. If the latter plan be 

 adopted, a quadrangular portion is pegged out on the ground 

 if the field is of irregular shape. A cord knotted at the 



Fig. 22.— Set frame for 

 acute angles. 



Fig. 23. — Planting in equilateral triangles. 



proper intervals is then dravrn from the site of the first hole 

 a in a direction parallel to AB, and the position of the knots 

 marked out by pegs.^ 



After determining the position of the point c and laying 

 out on the side CD (Fig. 20) the same divisions as on the line 



^ The planting chain invented by Baer, of Masneukirohen, can be recom- 

 mended (supplied by P. Zimmer, Getreidemarkt 1, Vienna VI. Price, 25K.= 



25s.). 



