An agricultural correspondent, Mr. D. li. Sperry, of the Chicago Tribune, saj's : " The best time (o top-dress upland inowing is imaieuiately alter the erop of hay ia taken ofl', more cpecia!ly in a dry peason likc the preseat. But tlien we do not always know the time to do the work. Iu that case tho winler will nnswer a good párpete. Last winter I top-dressed several ajres, liaulingout the miuiuro from the staUle oneo or twice n week. Tho resalt is two (r two and a half ton.s of lifiy to tho acre, against less than half that aiuonut ou that not tiius treated. Then og:iin, the hay is early, the last going into the bain and slack yesterdsy. I shall ospecta hoavy aftermath for goiling duiiup; October and November. Ten acres top-dressed will turn more lüiy ilian twenly without it. Will owners of suiall farms please make a note of this ?"