C. L. Whittles 



173 



The actual procedure adopted for plotting the results can be seen 

 from the following example : 



8-9 



Fine gravel u a , .,- „ ,, 



Coarslsantl 170 , -'■^- ^''^'^'^■ 



^r '"""' III I 30-3. Medinm. 



Fine silt 24-5 1 .-,„ „ „. 



Clay 4-4 , ~^-^- ^""^ 



Fine ^OOl linn. 

 Fine Siltl 

 Clay 



ass\an(l Wheat 



Wheat and 

 Wheat '''"^^ 



Ab 

 Sheepand Barley* 



'^' ,«('oarse Hop 



Orchard .^tX ■^Vhe; 



]5^ •T(d)acc 



Chenies and 

 I'otato Kiin, Woj.s 

 U.S. Alarkel (iaiden ^ ^ 



U.S. I'^arl^ aiarket (iardeii 



CoARSE>0'2uim. 

 I Fine (iravelj 

 [Coarse Sand| 



0-2uim. Mkdu'im O'Ol mm. 



)Fine Sand| 

 tSilt I 



Fig. 4. Comparison of types by proposed method. 



In Fig. 5 the side of the equilateral triangle ABC is 100 units, the 

 apices represent 100 per cent, of the respective ingredients. 



From B along BA cut oft' BP = 25-9 units 

 „ A „ AB „ AQ=30-3 „ 

 „ A „ AC „ AR= 28-9 -„ 



From P, Q and R draw PA', QY and RZ parallel with BC, AC and 

 AB respectively to form the triangle pqr. 



Then any point on the line PA' represents 25-9 per cent, of the coarse 

 particles, on QY 30-3 per cent, of the medium particles, and on RZ 28-9 

 per cent, of the fine particles. 



