Bitter Pit in Apples. 391 



Citric Acid. — 



Prepared Rokewood Apples. — In solution one week, and ex- 

 amined after one week. 



One per 10 OOO. Pits 1 to 4 mm. deep. 



One per 100,000. From superficial browning to pits 1 mm. 

 deep. 



One per 1.000,000. No perceptible effect. 



Prepared Rome Beauty ilpples. — In solution one week, and 

 examined after one week. 



One per 10,000. Small pits, few exceeding 1 to 3 mm. deep. 



One per 100,000. From superficial browning to pits 1 mm. 

 deep. 



One per 1,C0'0,000,000'. No perceptible effect. 



Nitric Acid. — 



Prepared Five Crown. — Three days in solution, and examined 

 after one week in air. 



One per 10,000. Large deep pits to each prepared spot. 



One per 100.000. Pits under 5 mm. diameter and 3 mm. 

 depth. 



One per 1,000,000. Pits small, superficial, none over 1 mm. 

 deep. 



One per 10,000,000. Superficial browning only. 



One per 100,000,000. Doubtful to no perceptible effect. 



One per 1.000,000,000. Doubtful to no perceptible effect. 



Prepared Rome Beauty. — One week in solution and one week 

 in air. 



One per 10,000. Pits 1-3 mm. deep. 



One per 100,000. Superficial browning to pits 1 mm. deep. 



One per 1,000,000. Doubtful to no perceptible effect. 



One per 10,000,000. Doubtful to no perceptible effect. 



These apples were wiped and had a good bloom, but a few 

 small brown spots appeared on the general surface with a con- 

 centration of 1 per 10,000, none with lesser concentrations. An 

 apple with the bloom scraped off from a line around the cir- 

 cumference showed a line of pits up to 5 mm. deep, but only 

 beneath lenticels after being in a solution of 1 per 1000 for 

 one week, and over the general surface most of the lenticels 

 showed as small brown spots none exceeding 1 mm. diameter. 



