[Note 2: The manures termed superphosphate of lime and phosphate of potass, were made by acting upon bone-ash by means of sulphuric acid, and in the case of the potass salt neutralizing the compound thus obtained, by means of pearl-ash. For the superphosphate of lime, the proportions were, 5 parts bone-ash, 3 parts water, and 3 parts sulphuric acid of sp. gr. 1.84; and for the phosphate of potass, 4 parts bone ash, water as needed, 3 parts sulphuric acid of sp. gr. 1.84; and an equivalent amount of pearl-ash. The mixtures, of course, lost weight considerably by the evolution of water and carbonic acid.] [Note 3: The medicinal carbonate of ammonia; it was dissolved in water and top-dressed.] [Note 4: Plot 5, was 2 lands wide (in after years, respectively, 5_a_ and 5_b_); 5.1 consisting of 2 alternate one-fourth lengths across both lands, and 5.2 of the 2 remaining one-fourth lengths.] [Note 5: Top-dressed at once.] [Note 6: Top-dressed at 4 intervals.] [Note 7: Peruvian.] [Note 8: Ichaboe.] The season of 1845 was more favorable for wheat, than that of 1844, and the crops on all the plots were better. On plot No. 3, which had no manure last year, or this, the yield is 23 bushels per acre, against 15 bushels last year. Last year, the 14 tons of barn-yard manure gave an _increase_ of only 5¼ bushels per acre. This year it gives an increase of nearly 9 bushels per acre. “Do you mean,” said the Deacon, “that this plot, No. 2, had 14 tons of manure in 1844, and 14 tons of manure again in 1845?” “Precisely that, Deacon,” said I, “and this same plot has received this amount of manure every year since, up to the present time--for these same experiments are still continued from year to year at Rothamsted.” “It is poor farming,” said the Deacon, “and I should think the land would get too rich to grow wheat.” “It is not so,” said I, “and the fact is an interesting one, and teaches a most important lesson, of which, more hereafter.” Plot 5, last year, received 700 lbs. of superphosphate per acre. This year, this plot was divided; one half was left without manure, and the other dressed with 252 lbs. of pure carbonate of ammonia per acre. The half without manure, (5a), did not produce quite as much grain and straw as the plot which had received no manure for two years in succession. But the wheat was of better quality, weighing 1 lb. more per bushel than the other. Still it is sufficiently evident that superphosphate of lime did no good so far as increasing the growth was concerned, either the first year it was applied, or the year following. The carbonate of ammonia was dissolved in water and sprinkled over the growing wheat at three different times during the spring. You see this manure, which contains no _mineral_ matter at all, gives an increase of nearly 4 bushels of grain per acre, and an increase of 887 lbs. of straw.