88 HOW CROPS FEED. 
This quantity was very irregularly distributed 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 1856 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 Hng., XVII, pp. 144 and 620.) 
AMOUNTS OF RAIN AND OF AMMONIA, NITRIC ACID, AND TOTAL NITROGEN 
therein, collected at Rothamstead, Eng., in the years 1855-6—calculated per 
acre, according to Messrs. Lawes, Gilbert, and Way. 
Quantity of Rain Ammonia | Nitric | Total Ni- 
in Imperial Gal- acid in \trogen in 
sagea Meg r.) ee g rains. grains. g? "ins. 
1855 | 1856 /1855| 1856 /1855)1856) 1855) 1856 
PAAR YS AAW SS ss ok y Shain = BS 13.523) 62.952 1244) 5005 230 1561/1084 4526 
WRAY 5 255 on oes iys eee ie 22.473). 30.586/2337| 4175 | 944! 544.2169] 3579 
CU | Miah y Sate Oe: Ea haa 52.484) 22.722/4513 2108 |1102 806 3995 1945 
EE Re aah ea PL Sean 9.281| 59.083 1141) 8614 | 3251063 1024) 7369 
Me tec ein eats ae 52.575 106.474/4206 18313 |1840 3024/3939 15863 
TiS OR es eR? oi aaa 41.295) 43.253'5574! 4870 (3303) 2046/5447) 4540 
EN AS AA ie Os eR 157.713 33.561 9620) 2869 |2680 1191/8615) 2670 
Ra Te es Ae ee 59.622, 59.859 4769) 4214 [3577 2125/4870) 4021 
LEE EC 2s eae a et eS 34.875] 47.477 3313] 5972 | 732 1'756 2917) 5373 
Memabier! 3205, cde eltee A 124.466 65.033 7592) 3921 |4480 2075/7414) 3767 
Marember 2.) ney aoe k 59.950 32.181 3021} 2591 |1007,1371 2749, 2489 
Wiectmubide 405 Baede< 2705 39.075) 50.870 2438] 4070 | 664 2035 2180) 3352 
Thi oe *. 6.2. ios aes | 663.332) 616.051.7.11| 9.58 |2.98 2. =r s 63| 8.31 
| gall’s. | gall’s. ilbs.| Ibs. ilbs.!Ibs./Ibs.| Ibs. 
According to Pincus and Rillie, 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. 
The quantity of nitrogen that fell as 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% Ibs. of nitric acid per acre of surface. 
In Bretschneider’s investigation. the amount of nitrogen 
