I hope to make the initial application of limestone five tons per acre, but after the first six years this will be reduced to two or three tons. I also plan to apply at least one ton per acre of fine-ground raw phosphate every six years until the phosphorus content of the plowed soil approaches two thousand pounds per acre, after which the applications will probably be reduced to about one-half ton per acre each rotation. There are three things that mother and I are fully decided upon: First, that we shall use ground limestone in sufficient amounts to make the soil a suitable home for clover. Second, that we shall apply fine-ground rock phosphate in such amounts as to positively enrich our soil in that very deficient element. Third, that we shall reserve a three-rod strip across every forty-acre field as an untreated check strip to which neither limestone nor phosphate shall ever be applied, and that we shall reserve another three-rod strip to which limestone is applied without phosphate, while the remaining thirty-seven acres are to receive both limestone and phosphate. Thus we shall always have the satisfaction of seeing whatever clearly apparent effects are produced by this fundamental treatment, even though we may not be able to bother with harvesting these check strips separate from the rest of the field. We have based our decision regarding the use of ground limestone very largely upon the long-continued work of the Pennsylvania Agricultural Experiment Station as to the comparative effects of ground limestone and burned lime, which is supported, to be sure, by all comparative tests so far as our Illinois soil investigators have been able to learn. The practicability and economy of using the fineground natural phosphate has been even more conclusively established, as you already know, by the concordant results of half a dozen state experiment stations. There are only two objections to the use of the raw phosphate. One of these is the short-sighted plan or policy of the average farmer, and the other is the combined influence of about four-hundred fertilizer manufacturers who prefer to sell, quite naturally, perhaps, two tons of acid phosphate for $30, or four tons of so-called "complete" fertilizer for $70 to $90, rather than to see the farmer buy direct from the phosphate mine one ton of fine-ground raw rock phosphate in which he receives the same amount of phosphorus, at a cost of $7 to $9. Until we can provide a greater abundance of decaying organic matter we may make some temporary use of kainit, in case the experiments conducted by the state show that it is profitable to do so. In a laboratory experiment, made at college it was shown that when raw phosphate was shaken with water and then filtered, the filtrate contained practically no dissolved phosphorus; but, if a dilute solution of such salts as exist in kainit was used in place of pure water, then the filtrate would contain very appreciable amounts of phosphorus.