45 G On the Growth of Barley hij different Manures, §r. 



The " Superphosphate of Lime, ^^ was composed (per acre) of — 



200 lbs. calcined bone-dust, 



150 lbs. sulphuric acid (sp. gr. 1" 7). 



The '■'^ Mixed Minerals J' consisted of both the "Mixed Alka- 

 lies" and the "Superphosphate of Lime," as above described. 



All the artificial manures, after being- well mixed with clay 

 and weed ashes up to a given measure, were carefully sown by 

 hand; for, though the drill is undouljtedly by far the best means 

 of getting an average distribution of manure over large ai'eas of 

 land, the experience of our wheat experiments has tauglit us that 

 there is danger of some irregularity' when applied only to small 

 ones, where accuracy, one compared with another, is essential. 

 The manures being sown, they were ploughed in very shallow. 



Ttie seed, which was tlie Chevallier, was however always 

 drilled — 2^ bushels per acre in 1852 and 1853, and 7 pecks per 

 acre in 1854-5-6 and 7. 



The results obtained during the six years' continuance of the 

 exporirnents are given in Tables as follows : — 



Table I. — Dressed Corn per Acre, in bushels and pecks. 



Table II. — Total Corn per Acre, lbs. 



Table III. — Total Straw and Chaff per Acre, lbs, 



Ta])le IV. — Total Produce (Corn and Straw together) per 

 Acre, ll)s. 



Table V. — Proportion of Total Corn, in 100 Total Produce. 



Table VI. — Proportion of Dressed Corn, in 100 Total Corn. 



Table VII. — Weight per Bushel of Dressed Corn, lbs. and 

 tenths. 



Table VIII. is a summary of Tables I. to VII. inclusive. It 

 gives, for each separate year, the seven characters of crop which 

 the former Tables respectively record, but for the mean only of 

 five classes, into which the series of individual experiments arc 

 here arranged. This Table affords, therefore, at one view a com- 

 parison of the effects of the individual seasons (both upon the 

 quantity and quality of the produce); and each under the influence 

 of five distinct classes of manures. 



Table IX. is a summary of another kind. It gives for each 

 of the twenty individual manures its averayc annual effect, 

 taken over six years, on each of the characters of quality and 

 quantity of the produce. In this Table, therefore, instead of 

 comparing the influence of the individual seasons, we compare 

 that of the individual manures, taking for each the mean result of 

 six years' trial. (For the Tables I.-IX. inclusive, see pp. 458-475.) 



