22 BULLETIN 1073, U. S. DEPARTMENT OF AGRICULTURE. 



Tertoh was poor and possibly immature. As will be seen from the 

 table, several of the varieties are rich in oil. Of these Cabnal was 

 believed to have the best flavor. Kanola, while small, also has a 

 good flavor and possibly matures as early as February, when the 

 markets are not glutted with fruit. The protein content of these 

 importations is lower than that of the standard varieties developed 

 in California. They have the heavy skin of the Guatemalan types, 

 which is possibly a marked advantage when shipping quality is con- 

 sidered. The seeds in a number of them are also larger than the 

 average seeds of the types developed in California. All of these 

 fruits are from young trees, and possibly some of the characteristics 

 will be modified as the trees develop. 



The analyses of other California types and seedlings are given in 

 Table 5. Many of these are seedlings which have not yet been grown 

 by vegetative propagation, so that it is of little use to comment on 

 their quality. The data, however, are of value to those who are 

 seeking promising experimental material. 



CONCLUSIONS. 



No satisfactory correlations between physical properties and ma- 

 turity have been found in the avocados examined. 



The proportion of many of the constituents of the avocado changes 

 during its development, the most marked change being the increase 

 of the fat content. This takes place rapidly while the fruit is imma- 

 ture, and much more slowly as it approaches maturity, with possibly 

 a slight decrease if the fruit remains too long upon the tree. It is 

 accompanied by a decrease in sugar content. 



Fruits rich in fat (above 20 per cent) contain at least 70 per cent 

 of that constituent on a water-free basis at maturity. 



On storage of immature fruits there is an apparent increase in the 

 proportion of fat, accompanied by a decrease in the sugar content 

 and undetermined matter. 



Mature fruits on storage do not show this increase to the same 

 extent, and at times show some loss. 



No standards of maturitv are recommended. 



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