WITH MURIATE OF AMMONIA. 197 



muriate of ammonia, was especially remarkable. In the second 

 experiment the horn-dust had nearly an equal effect with the 

 sal-ammoniac. 



b Mr Kuhlmann applied it in the two successive years of 

 1845 and 1846, the former, in French Flanders, a very wet, 

 the latter a very dry year, with the following effects upon the 

 produce of hay in each year, per hectare : 



1845. 1846. 



First cut. Second cut. 



No application gave . 5608 2136 3519 



Sal-ammoniac, 200 kilos. . 7665 1723 5576 



Difference, 2057 413 2057 



In both years this application gave an increase of hay, but 

 most in the dry year 1846. The force of the sal-ammoniac, in 

 1845, was expended on the first cutting, unless we suppose that 

 the great fall of rain may have washed some of it out of the 

 soil. 



On the whole, were it a cheaper material, the application of 

 muriate of ammonia might be safely recommended as worthy 

 of trial, even on the part of the farmer who seeks for profit 

 only. 



6. Results of experiments with nitrate of ammonia. 



The only experiment made by weight and measure with 

 nitrate of ammonia, with which I am acquainted, has been pub- 

 lished by Mr M'Lintock, of Harley Works, near Glasgow. He 

 applied it in 1842 to a second year's crop of Blainslie oats, top- 

 dressed on the 13th of May, with the following results : 



Grain. Straw. Chaff. Hay in 1843. 



No application, . gave 35f bush. 92 stones 304 Ib. 201 stones 

 Nitrate of ammonia, 96 Ib. ... 57 ... 161 ... 448... 197 ... 



There was here a very considerable increase both in grain 

 and in straw. Even the chaff was nearly doubled in weight. 

 The next year's hay, however, was not sensibly affected. 



The fact that both the ammonia and the acid with which it 

 is combined in this salt contain nitrogen in a form in which 



