The Deacon seemed uneasy. He did not like these remarks. He had got the impression, while Charley was reading, that much more was proved than Dr. Vœlcker claims in his Summary. “I thought,” said he, “that on the part of the field where the clover was allowed to go to seed, Dr. Vœlcker found a great increase in the amount of nitrogen.” “That seems to be the general impression,” said the Doctor, “but in point of fact, we have no proof that the growth of clover, either for hay or for seed, had anything to do with the quantity of nitrogen and phosphoric acid found in the soil. The _facts_ given by Dr. Vœlcker, are exceedingly interesting. Let us look at them: “A field of 11 acres was sown to winter-wheat, and seeded down in the spring, with 13 lbs. per acre of clover. The wheat yielded 40 bushels per acre. The next year, on the 25th of June, the clover was mown for hay. We are told that ‘the _best part_ of the field yielded three tons (6,720 lbs.) of clover-hay per acre; the whole field averaging 2½ tons (5,600 lbs.) per acre.’ “We are not informed how much land there was of the ‘best part,’ but assuming that it was half the field, the poorer part must have yielded only 4,480 lbs. of hay per acre, or only two-thirds as much as the other. This shows that there was considerable difference in the quality or condition of the land. “After the field was mown for hay, it was divided into two parts: one part was mown again for hay, August 21st, and yielded about 30 cwt. (3,360 lbs.) of hay per acre; the other half was allowed to grow six or seven weeks longer, and was then (October 8th), cut for seed. The yield was a little over 5½ bushels of seed per acre. Whether the clover allowed to grow for seed, was on the richer or poorer half of the field, we are not informed. “Dr. Vœlcker then analyzed the soil. That from the part of the field mown twice for hay, contained per acre: First six Second six Third six Total, 18 inches. inches. inches. inches deep. Phosphoric acid 4,950 2,725 3,575 11,250 Nitrogen 3,350 1,875 1,325 6,550 “The soil _from the part mown once for hay, and then for seed_, contained per acre: First six Second six Third six Total, 18 inches. inches. inches. inches deep. Phosphoric acid 3,975 4,150 3,500 11,625 Nitrogen 4,725 3,350 2,225 10,300 “Dr. Vœlcker also ascertained the amount and composition of the clover-_roots_ growing in the soil on the two parts of the field. On the _part mown twice for hay_, the roots contained per acre 24½ lbs. of nitrogen. On the _part mown once for hay, and then for seed_, the roots contained 51½ lbs. of nitrogen per acre.”