EXTRACTS FROM PROCEEDINGS. 



lxxiii 



7. Trifolium pratense (pereime), red clover. 



8. Wedicago lupulina (perennis), yellow clover. 



9. Trifolium repens (perenne), white or Dutch clover. 



10. JPlantago lanceolata. 



11. Achillea millefolia. 



12. Daucus carota. 



It will be seen that, of the dozen plants recommended for ex- 

 periment, six are true grasses, three clovers, and three common 

 weeds in pastures. 



Tor each of the preceding plants, six boxes, each 2 ft. wide, arid 

 18 inches deep, are recommended : — 



1. One box to be left unmanured. 



2. „ manured with a purely mineral mixture. 



3. „ „ „ ammonia only. 



4. „ „ „ nitrate of soda only. 



5. „ „ „ ammonia and mineral manures. 



6. „ „ „ nitrate of soda and mineral manures. 



The following manures and quantities are recommended : — 



ounce. per acre. 



Tor box 2. 1-47 j of sul P hate of P otasl b or at the rate J i 00 



1*47 carbonate of lime 1000 



•15 chloride of sodium 100 



1-47 bone ash treated with \ f 1000 



1-10 sulphuric acid J \ 750 



For box 3. *59 sulphate of ammonia 400 



"59 chloride of ammonia 400 



For box 4. 162 nitrate of soda 1100 



For box 5. The manures used in 2 and 3. 

 For box 6. „ „ 2 and 4. 



The amount of nitrogen in the preceding quantity of nitrate 

 of soda recommended for box 4, it may be observed, is the same 

 as that in the sulphate of ammonia and chloride of ammonia 

 employed in box 3. 



Dr. Gilbert has kindly promised to furnish the preceding ma- 

 nures, which should be intimately incorporated with the whole 

 of the soil in the several boxes. 



When necessary, the plants under experiment should be 

 watered with soft pure water, and otherwise attended, and their 

 progress be watched and recorded. 



VOL, II. g 



