390 



Kace Xo. 22 haf? tubers almost identical with those of Xo. 20 

 in respeet of skin and oolour. One of them was fimired on p. 299 

 as tig-ure Xo. S. Tlic aNcragc yichl was H lbs. 1 oz. (7738 

 grammes) wiiiili is a return at the rate of iK'arlv 17 tons ;} cwt. 

 per acre. 



Raeo Xo. 44, lias white flesh with a little magenta sap in the 

 layer jnst under the skin, and in this is like the two last: hut its 

 surface is rather free from the rootiness which marks them. Its 

 average yield was 14 lbs. 13 oz. (6719 grammes) which is a return 

 at the rate of nearly 14 tons 18 cwt. per acre. 



Race Xo. 56 produces tubers with magenta sap in them at 

 nil depths. Its average yield was 5 lbs. 6 oz. (2458 grammes), 

 which is a return at the rate of 5 tons 8 cwt. per acre. 



Eace Xo. 60 in flesh and skin is exactly as the last. Its 

 average yield was 4 lbs. 5 oz, (1956 grammes) whidi is a return 

 at the rate of 4 tons 6^ cwt. per acre. 



Race Xo. 42 has flesh with a salmon tint, the difl'used magenta 

 which in a yellow flesh results in this colour, increasing in intensity 

 to the skin. Its average yield was 4 lbs. 2 oz. (1871 grammes), 

 which is a return at the rate of just under I tons 3 cwt. per acre. 



Race Xo. 40 produces lol)ular flattened tubers, free of rootlets, 

 with white flesh, and a layer of tissue witli magenta sap under the 

 skin. It returned on the average 10 lbs. 9 oz. (4791 grammes) or 

 at the rate of 10 cwt. 12 cwt. per acre. 



Race Xo. 58, has white flesh — not quite ivory white but with 

 a faint salmon flush, and under the skin is a layer of tissue holding 

 magenta sap. Its average yield was 5 lbs. 2 oz. (2325 grammes) 

 or at the rate of 5 tons 3cwt. per acre. 



Race Xo. 64 has white flesh which turns brown ((uickly on 

 exposure to the air. It has no magenta sap. Its average vield was 

 17 lbs. 10 oz. (7995 grammes) or at the rate of 17 tons 14 cwt. 

 per acre. 



Race Xo. 102 from Saigon where it is known as Khoai-mo, 

 agreed closely with Xo. 64 from the Philippine islands, but possess- 

 ed magenta sap under the skin. It yielded one tuber weighing as 

 mucli as 15 lbs. Init the average return was no more than 2 lbs. 

 13 oz. (1276 grammes) which is a yield at the rate of 2 tons 2^ 

 ewt. per acre. 



Race Xo, 78 from the Phili lupine islands produces tubers con- 

 taining magenta sa]) at all depths, the skin being free from rootlets. 

 Its average return was 8 ll)s. 11 oz. (3941 grammes) which is a 

 yield at the rate of 8 tons 14i cwt. per acre. 



Race Xo. 98 from Saigon, known there under the name of Khoai- 

 siam, has wliite flesli, sometimes witli a little magenta in tlie deeper 

 part of the tissues, sometimes without. Its average return was 

 7 lbs, 10 oz. (3459 grammes) or at the rate of just over 7 tons 13 

 cwt. per acre. For 1917 it is being selected into two by the 

 presence or al)sence of the magenta sap in tlie deeper tissues. 



