46 BULLETIN NO. 3, DIVISION OF ENTOMOLOGY. 
age in lifting, the descending part should preferably have a flexile joint 
just below midway, to bend like a knee when the lift is made. The upper 
half of the descending pipe is rigidly continuous with the stiff parallel 
part, forming therewith a bent angle, while the proximal end of the 
parallel part is turned backward as a hollow tubular crank, having its 
handile-end communicating with one of the radiating or slack hose pipes, 
which allow the stiff parts to be shifted laterally. By swinging the back - 
ward crank-shaped part of the pipe over to a forward position, into a 
catch, the hanging parts of the pipe are swung upward above the plants 
and sustained there. This season two, three, and four of these crank- 
ended pipes were tried, combined with the same bar. When the 
horizontal part of such a pipe is short or not too heavy it will be shifted 
laterally automatically by the trailing part by the method already 
noticed ; but where the pipe is too heavy or rough to slide easily the 
hand of the pumper must occasionally be used upon the proximal or 
crank end to shove the pipe into such position as will suitably adjust 
the nozzles to the rows. | 
In the divergent arrangements thus indicated the shifting or lateral 
adjustability is permitted by opening or shutting the angles between 
the diverging tubes, and this is, in its operation, in some sense, analo- 
gous to taking out and letting out slack in the connecting parts between 
the nozzles. By asurplus amount of inflection or slack, by joint or other 
flexibility, in a tube or tubes connecting the tops of any two neighbor- 
ing pipes, whether right, left, or mesial, in a system, the two can be sep- 
arated, approximated, or independently adjusted to the extent desired. 
By this method the stiff pieces sliding on the bar and supporting the 
pipe-tops can be short, light, and arranged somewhat end to end, joined 
in tandem order, with intermediate flexile crooks that may be extended 
or shortened as operated by the automatic action of the trailing branch. 
These tandem gangs of light, sliding segments for supporting or sup- j 
plying the tops of the pipes, have stood a satisfactory test in the cot- 
ton this season. 
Such parts may also be arranged on bars having a slope backward 
or downward, as on the A-frames, or other kinds of frames, or they can 
be set in a somewhat zigzag manner on a ecross-bar. This use of a 
slope gives certain advantages, and characterizes some varieties of 
apparatus closely related to that just noticed. In these, the pulling 
of the downward pipe, by its gravitation or friction, causes its top 
piece, which has an inclination to slide on the slope, to travel in a 
diagonal direction along on the support and across the rows; but work- 
ing in opposition thereto is a pull-line or cord haying one end ona 
winder near the hand of the pumper. Letting out the line allows the 
pipe to travel farther along the slope, and winding it up draws the pipe 
in the opposite direction. Thus any pipe at a distance can be easily 
shifted and set at « point to suit by letting out or drawing theline. This 
principle I have executed in three ways: In the first, the supply tube 
