By Edward Solly, Esq. 



77 



The proportion of grain to the whole crop therefore was as 1958 

 to 10000. One thousand seeds weighed 651 grains. The standard 

 measure full weighed 4242 grains. Hence the bushel would weigh 

 60^ lbs. The Nitrate of Soda in this and the following square 

 produced a very luxuriant growth, closely resembling that caused 

 by the salts of Ammonia ; the plants appeared to be weaker than 

 those manured with ammoniacal compounds, for though no larger, 

 they were more laid than the others were. 



24. Nitrate of Soda and Silicate of Potash. These substances 

 were applied at the rate of 3 cwt. of the former, and 1 \ of the 

 latter. The produce was 



Chart' 



The proportion of grain to the whole crop therefore was as 1666 

 to 10000. One thousand seeds weighed 562 grains. The stan- 

 dard measure full weighed 3952 grains. Hence the bushel would 

 weigh 56 \ lbs. 



From the comparatively small scale on which these experiments 

 were made, it is evident that the results cannot be considered as 

 giving exactly the relative effects produced by the different ma- 

 nures employed, the experiments were however carefully made, 

 and possess considerable interest in themselves, even independent 

 of the chemical enquiries to which they will hereafter lead. 



Perhaps the fairest mode of judging of the effect produced by 

 these manures, was to compare the growing crops together, previous 

 to their coming into ear, the differences were then very marked, it 

 was evident that by far the greatest effect was throughout pro- 

 duced by the salts of Ammonia and the Nitrate of Soda. The 

 most remarkable effect of all was produced by Muriate of Ammo- 

 nia ; the plants manured with this salt were distinguished not only 

 by the luxuriance of their growth, but likewise by the very deep 

 blue green colour of the foliage, those manured with Sulphate of 



