ROTARY BLOWERS 233 



slop out slightly. To preveut this a hollow lip may be added, as iu 

 Fig. 6, to catch the lower part of the spray and allow it to flow back. 



In the figure just cited this arrangement, /i, and the drum d are shown 

 in section. The spray- discharge being at s, the heavier part of the 

 spray is lowest, and passes into the hollow lip, /t, thence flowing down- 

 ward to re-enter the base of the drum at a?, where the constant depth 

 of water is indicated by horizontal broken lines, and shows the water- 

 inlet, above which the water cannot rise in the drum. At/ is shown 

 the peculiarity of one of the fans. Its end, i, is seen to be i)rovided 

 with teeth or hooks, which alternate in two rows, and each has its dis- 

 tal half bent forward at right angles to the fan. These cut througii 

 the liquid, allowing the blast to enter it, and they also cut up, splash, 

 and carry some of the liquid which is blown out at s by the blast from 

 the face, /, passing outward through these teeth or hooks. 



A single drum may have two outlets, one near each end, and so tbrow 

 two sprays at different angles; but the outlet farthest in the direction 

 of rotation should be much the largest, to give an equal spray, as shown 

 in one blower, which I planned for this purpose. 



Unfortunately, my experience shows that a rotary-blower blast carry- 

 ing a fluid spray cannot well be divided, or have its direction changed, 

 by pipes or deflectors, because its impact against any surface that would 

 alter its course condenses the spray there, so that it is left from the 

 blast and flows down. 



It is easy to use these machines for sprinkling in a horizontal direc- 

 tion or from above, bat to throw up underneath the foliage of low plants 

 they must be carried very close to the ground. 



There are various ways of conveying and operating these blowers, and 

 the following machine will serve as an example: 



Mr. D. E. Darnell, of Masonville, Burlington County, New Jersey, 

 has lately obtained a patent, No. 254804, March 14, 1882, on a rotary- 

 blower apparatus, for distributing insect poison and fertilizers, that 

 merits attention in this connection. It appears in«Plate XXYIII, Figs. 

 6 and 7, and consists of a barrel, a, rotary agitator, <?, a rotary blower, 

 71, with a belt, «, and train of gears, /, e, 7i, j, driven by the rotary axle, 

 d^ of a pair of wheels that carry the whole machine, which is drawn by 

 one horse in shafts. By a clutch the main wheels are released from 

 driving the gears to throw the apparatus out of action. 



It may be seen that the reservoir has the arrangement of a common 

 horizontal barrel-churn, and the rotary dasher, c, inside is driven by 

 cog-wheels, /, e. The gear,/, also communicates through gear, j, its axle, 

 /<:, the pulley, Z, and band, s, to drive the rotary fans of the blower, n. A 

 supply-tube, ^, leads from the reservoir to the blower-case, which it en- 

 ters at the horizon of its axle. A cock, t, adjusted by the crank seen 

 behind, regulates the outflow. The blower is so hung by the parts i?, (/, 

 r, that its discharge-pipe, Fig. 7, ^, may be thereby directed somewhat 

 up or down or laterally. No new principle in the blower proper seems 



