186 Transactions of the American Institute. 



fully observed. Too much window, however, would cause a waste 

 of heat. The door of the fire room, and the doors of the drying 

 room, should each be furnished with a single square of glass, so 

 that the condition of the interior may be noted without opening a 

 ■door. Attached to one end of the building there should be a large 

 and strong platform, to receive the hops in sacks, and a door should 

 open into the drying room. 



A kiln, such as is described, would constitute only a portion of 

 a hop-house, for it has no room for storage. The floor of the store 

 room may be on a level with, or several feet lower than the floor 

 of the drying room, and should be large enough to contain the 

 entire crop, for there is always some loss in weight and risk of 

 heating in the bale, when hops are pressed in less than three or 

 four weeks after drying. It is in the store room that the procees 

 of curing is completed. If hops must be packed directly from the 

 kiln, they must also be over-dried to fit them for such packing. 

 This floor should be jointed, of seasoned stufi", and as smooth as 

 possible. At a convenient place, with reference to the press on 

 the lower floor, an opening, twelve or more inches square, should 

 be left, in order to feed the press at the time of packing. The 

 windows of the store room should be darkened while the hops are 

 stored, as exposure to light is calculated to impair their brightness. 

 The ground floor of the store room may be fitted and used for any 

 purpose of storage, and will always be found useful on a farm. 

 Double Idlns are frequently used for large yards, but very often 

 are less manageable than those constructed singly, as they are less 

 controllable in the matter of draft. A double kiln is made by 

 running a partition so as to make two fire rooms and two kilns 

 under one roof, so that fresh hops may be laid upon one before 

 those partially dried are removed from the other. 



THE CmCtnLATION OF THE SAP IN PLANTS. 



Mr. N. W. Bliss, Warsaw, Illinois, a member of the Institute, 

 sends to the Club the following paper, on the circulation of sap in 

 plants, read befbre the Warsaw Horticultural Society: 



" It was, I think, the precocious son of a Roman scholar, who at 

 the early age of ten years, was discovered, one day, by his father, 

 engaged in inventing geometry. His father at once brought him 

 a copy of Euclid, saying, • Son ! why waste your time, when 

 your work is already done to your hand?' At the January meet- 

 ing of this Society, after the expression on the part of several 



