88 



now CROPS FEED. 



This quantity was very irregularly distributeil among the 

 months. In 1855 the smallest amount was collected in 

 January, the largest in October, the latter being nearly 

 20 times as much as the former. In 185G the largest 

 quantity occurred in May, and the smallest in February, 

 the former not quite six times as much as the latter. 



The following table gives the results of Mr. Way entire. 

 {Jour. Roy. Ag. Soc. of Eng., XVII, pp. 144 and 620.) 



Amounts of Rain and of Ammonia, Nitric Acid, and totai. Nitrogen 

 therein, collected at Rothamstead, Eng., iu the years lSo5-6— calculated per 

 acre, according to Messrs. Lawes. Gilbert, and Way. 



Qvantity of Rain 

 in Imperud Gal- 

 lons, (1 gal. = 10 

 lbs. water.) 



1855 



1856 



Ammonia 



in 



grains. 



Nitric 

 acid in 

 grains. 



1855| 1856 1855 1856 



Toial M- 



trogen in 



grains. 



1855:1856 



January. . . . 

 February . . 



March 



April 



May 



June 



July 



August 



September. 

 October... 

 November . 

 December. . 



1244 



2337 



.'.W 32.181,3021 

 .0751 50.870:2438 



Total. 



2bciy 



4214 

 5072 

 3921 

 2591 

 4070 



3352 



i m:i.-3Si\ 616.05ll7.11 9.53 2.98 2.806. 



i gall's. I gall's, i lbs. lbs. lbs. lbs. libs. lbs. 



230 1561 1084! 4526 



944i 544'2169| 3579 

 1102 8(Hi 39951 1945 



32.-) lot;:', 10241 7369 

 lMo:;i)-,'l ;i9.39:l5863 

 :i:m •J04(i .^j447| 4540 

 20*0 1191,8615 

 :i>77'212.-> 4870 



7321756,2917 

 4480 2075 7414 

 1(M7 137112749 



664 203512180 



2670 

 4021 

 5373 



3767 



According to Pincus and Rollig, the atmospheric water 

 brought down at Insterburg, in the year ending with 

 March, 1865, 7.225 lbs. av. of nitric acid per English acre 

 of surface. j 



The quantity of nitrogen that fell ns ammonia was^ 

 3.628 lbs.; that collected in the form of nitric acid was 

 1.876 lbs. The total nitrogen of the atmospheric waters 

 per acre, for the year, was 5.5 lbs. The rain-fall was 

 392,707 imperial gallons. 



Bretschneider found in the atmospheric waters gathered 

 at Ida-Marienhiitte, in Silesia, during 12 months ending 

 April 15th, 1866, 3|- lbs. of nitric acid per acre of surface. 



In Bretschneider's investigation, the amount of nitrogen 



