[92] This in tons 162,946, which represents 1,041,384 tons of nitrate of soda.
[93] This in tons 40,625, which represents 259,633 tons of nitrate of soda. See paper in 'Journal of Science' already referred to.
[94] Europe's total production may be stated at 200,000 tons.
[95] 10,500 tons of which were as guano.
[96] Mr Warington estimates this at about 8 lb. See p. 141.
APPENDIX TO CHAPTER III.
NOTE I. (p. 119).
Determinations of the Quantity of Nitrogen supplied by Rain, as Ammonia and Nitric Acid, to an Acre of Land, during One Year.