LUTHER BURBANK 



ence could be seen between the two lots; on the 

 whole the cold storage seeds showed rather the 

 poorer growth. 



Further Improvements of Method 



An even better method of preserving the seed 

 was presently developed, and I was finally able to 

 preserve the stoneless seeds almost as securely as 

 if they had their original protective covering. 



My new method consists in washing the 

 stoneless seeds in clear fresh water when first 

 removed from the fruit; immersing them for a 

 few minutes in a week solution of "Bordeaux 

 mixture" (sulphate of copper and lime-water), 

 then rinsing for a brief period in fresh water, and 

 placing them in damp sawdust that has been 

 sterilized by boiling, care being taken that the 

 sawdust is barely moist, not wet. The box con- 

 taining the seeds is placed on the north side of a 

 building, in a cool, shady place, and examination 

 is made from time to time to see that the seeds 

 do not become too dry or infested with insects or 

 mold. 



If treated in this way, the seeds are practically 

 all saved; they maj'^ be planted out cff doors 

 like other plum seeds, and they will germinate 

 promptly. 



It is obvious that a seed requiring such careful 

 treatment to preserve it all the winter would 



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