230 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 



force enough to overcome light breezes. If greater distance is desired 

 additional segments may be inserted. These are easily keyed together 

 by a wire hanging inserted through the joints. By reinoving the 

 crooked segment or reversing it, the same implement may be used to 

 deliver in advance of the person or in a downward, horizontal, or upward 

 direction with a single or double cloud. This rotary blower can be 

 combined with a wheeled cultivator and be operated thereby. Also a 

 series of such blast-spouts supplied from as many blowers, more econom- 

 ically from a single blower of large capacity, can be combined to form a 

 compound machine. 



In Plate XXVII, Fig. 4, is one of these compound machines which I 

 devised for use with a single horse and to supply six rows or two rows 

 and two half-rows as desired. It may yet prove practical to use a 

 greater number of spouts and supx3ly a larger number of rows at each 

 drive ; but my experience has only shown that three such spouts can 

 be practically used. This machine was tested at Ithaca, K Y., and 

 afterwards tried in the cotton near Atlanta, Ga. The thin tin of such 

 a machine is apt to get bent unless very carefully managed. Stout 

 sheet metal should be used for the drum especially. Many dents in the 

 pipes have not proved seriously objectionable. The whole is mounted 

 on an A-shaped frame, zz^ having three wheeled legs, ti% and is drawn 

 by the shafts or whiffletree in front. The two lateral arms of the frame, 

 0, can be set wider or nearer apart upon tlie cross-bar, z^ to suit wider 

 or narrower row-interspaces. Each hind leg is a stout section of iron 

 gas-pipe (Ij^g inches), screwed or welded to an iron plate on its top, 

 which is bolted to the frame. Its lower hollow extremity is mounted 

 on a swivel-pin, having an elbow extension backward to its wheel. 

 These swivel wheels are intended to prevent side-draft strain, and 

 are especially of value in turning. They need not be large or strong, 

 as the hind parts of the machine have little weight. The front leg t 

 is an arch of iron (3 by \ inch), bolted above, beneath the apex of the 

 frame. Thus it is really a double leg 37J inches long. To the sides are 

 fastened bars, A;, extending forward to su^^port the whiffletree, while 

 to the lower extremities are boxed the ends of the revolving axle of the 

 draft- wheel, w^ and its large drive-gear, u. These wheels are respect- 

 ively 30 inches and 16 inches in diameter. The latter drives a small 

 (3-inch) pinion on the axle of the large (14-iuch) band-wheel j. These 

 are on opposite sides of one leg, to which their axle is boxed. The band 

 is of very soft, light leather, and whirls the small (|-inch) pulley o with 

 the fans on its axis in the drum. The eads of the casing are bilged to 

 give stiffness, and its outside should be annularly ribbed or otherwise 

 stiffened or encased for protection. The large powder-can upon it is 

 closed hermetically by a tight cap or cork. The three-way discharge 

 must be somewhat downwards, and the pipes should slope down more 

 and more as they advance. It is best to give them a projectile curve. 

 This is for the purpose of keeping the powder toward the upper part of 



