303 



A root of each had be.en received from Major A. T. Gage, Super- 

 intendent of the Royal Botanic Gardens, Calcutta, in the end of 1912, 

 and the tubers were planted in the Economic garden. 



Thirty plants in all were grown. Seven were raised from tubers 

 of Goradu, ten from China alu and thirteen from Pora alu. 



The seven plants of Goradu gave in turn 4^ lbs. of tubers, the 

 ten of China alu 5% and the thirteen of Pora alu 31% lbs. 



These sown again in 1914 returned :— 



No. 34,125 3! I yams weighing 154^2 lbs. or 70 kilogrammes. 

 No. 33,346 100 ,,' „ 46 ,, or 21 



No. 34383 200 ,, 28 „ or 12^^ 



The tubers of the first ran up to 3 lbs. or 1460 grammes, those of 

 the second to zH or 1,247 grammes, but those of the third were not 

 above I lb. or 434 grammes in weight. 



The rate per acre works out at : — 



No. 34,125 21,851 lbs. per acres or 9,932 kilogrammes. 

 No. 33,346 13,011 „ ., 5.902 



No. 34,383 7-820 „ „ 3..S93 



The greatest yield is greater than the best expected of potatoes in 

 particulary fertile districts of Europe. But then the plot was very 

 small (28 feet by 22 feet) containing four rows of plants sown in 

 well manured trenches. 



Dioscorea aciileata— four Philippine races. 



Along with the greater yams from the Philippine islands, 

 described in the preceeding pages, were grown four races of the lesser 

 yam from the same sources, typical roots of which are figured here in 

 outline. 



Collectively the races are there called in the Tagalog language 

 Tugui a name like that, Tu-cu, used in Annam. 



