274 APPENDIX TO PART I. 



*'The third portion was left, like the first, without 

 addition. 



*'The fourth, or that farthest from the hedge, had a 

 similar top-dressing of nitrate of soda applied at the same 

 period. 



** The salts were respectively scattered over the strips 

 of land in as uniform a manner as possible, and became 

 diffused through the soil, by means of the showers which 

 followed shortly after their application. 



*' As the wheat advanced towards maturity, the nitrated 

 patches were distinguishable, by the more vivid greenness 

 of the crop, and by its standing up somewhat above the 

 general level, but this difference was less perceptible at a 

 later stage of its progress. 



'* In the autumn the whole was reaped as usual, and the 

 following results obtained : 



** No. I. produced only 5 bushels, 54 lbs. of grain, or 23 

 bushels, 36 lbs. to the acre, but the crop had been ac- 

 cidentally trodden by sheep, and much devoured by birds. 

 The straw was not weighed. 



*'No. 2. produced 7 bushels, 51 lbs., or 31 bushels, 48 

 lbs. to the acre, and 520 lbs. of straw = 1 ton, cwt. 80 lbs. 

 to the acre. 



**No. 3. produced 6 bushels, 54 lbs., or 27 bushels, 36 

 lbs. to the acre, and 421 lbs. of straw = 16 cwt. to the acre. 



*'No. 4. produced 6 bushels, 48 lbs., or 27 bushels, 

 12 lbs. to the acre, and 432 lbs. of straw = 15 cwt. 48 lbs. 

 to the acre. 



" With respect to weight, that of No. 2. was 62| lbs. to 

 the bushel, that of No. 3. and 4. was only 62 lbs. 



**Now 3| lbs. of flour from No. 3, produced of bread 

 4 lbs. 4 ozs. 



" Whereas 3J lbs. from No. 2. produced 4 lbs. 14 ozs. 



** Hence the difference, between the produce of the strip 

 of ground which had been manured with nitrate of potass, 

 and that which had received no manure, may be calculated 

 as follows : 



'* Amount of produce, of 

 Bu. lbs. 



''No. 3 6 54 = 6. 



''No. 2 7 57 = 7. 



" As 6 : 7 : : 100 : 120, or 20 per cent, of increase in the 

 amount of produce. 



"To which add, that the quantity of flour, that in No. 



