124 HATCH EXPERIMENT STATION. [Jan. 



First Lot, Nos. 1, 3 and 5. 



Box 1. * Box 3. 



Sulphate of potash, . .7.68 Sulphate of potash, . . 7.68 



Dissolved bone-black, . . 24.38 Dissolved bone-black, . .24.38 



Dried blood, . . . 40 . 22 Philadelphia tankage (a 



steamed leather refuse), . 57.16 



Box 5. 

 Sulphate of potash, . . . . . . .7.68 



Dissolved bone-black, 24.38 



Raw-leather waste, 56 . 64 



Second Lot, Nos. 2, 4 and 6. 



Box 2. Box 4. 



Sulphate of potash, . . 7.68 Sulphate of potash, . . 7.68 



Phosphatic slag meal, . 24 . 38 Phosphatic slag meal, . 24 . 38 



Dried blood, . . .40.22 Philadelphia tankage (a 



steamed leather refuse) , 57 . 16 



Box 6. 



Sulphate of potash, 7.68 



Phosphatic slag meal, . . . . . . 24 . 38 



Raw-leather waste, 56 . 64 



The Seed. — Winter rye was planted in all boxes Oct. 2, 

 1894. The young plants came up uniformly in all boxes 

 October 5. They reached a height of from five to six 

 inches before frost set in. After being fully developed, 

 they were reduced in all the boxes to a corresponding 

 number, as in the first experiment. 



The watering of the soil was partly by subirrigation and 

 partly by surface application, maintaining as far as practica- 

 ble the moisture of the soil from 15 to 18 per cent, during 

 the growing season. The experiment was conducted with 

 a view to expose the soil to the unrestricted influence of the 

 local temperature of the various seasons. A layer of snow 

 served as protection to the young growth during severe 

 spells of frost in winter. 



The manurial substances used consisted of high-grade sul- 

 phate of potash, dissolved bone-black, phosphatic slag meal, 

 dried blood, Philadelphia tankage (a steamed leather) , and 

 ground sole leather waste. The amount of nitrogen and 



