REMEDIES AND PREVENTIVE MEASURES. 65 
the oil-pipe being within the air-pipe, and both pipes meeting at the point of dis- 
charge, at the nozzle. The plunger or piston of the oil-pump is actuated by a rod. 
Fig. 27.—Atomizing machine invented by John Bowles, Washington, D. C. 
pivoted to the board h, at a point that will give the oil-compresser such increased 
leverage as may be demanded for its proper discharge. 
PRUNING AND BURNING. 
The old and well-tried remedies of pruning or burning, or pruning 
and burning, will answer every purpose against the Web-worm in ordi- 
nary seasons, where it is thoroughly done and over a whole neighbor- 
hood. It must, however, be done upon the first appearance of the 
webs on the trees, and not, as was done by the Parking Commission of 
this city Jast season, after the first brood of worms had attained their 
full growth and many had already transformed to pup. The nests 
at that time had assumed large proportions, and their removal entire 
injured the appearance of many young trees. Then, too, they were 
piled upon an open wagon, which was dragged for many hours around 
the streets, permitting a large proportion of the worms to escape. 
On the first appearance of the webs, which should be looked for with 
care, they should be cut off or burned off, and if cut off they should be 
burned at once. The “tree pruners,” manufactured for the trade and 
well known to all gardeners, answer the purpose admirably. 
The customary method of burning the nests is by means of rags 
saturated with kerosene or coal-tar and fastened to the tip of a long 
pole. An old sponge has been substituted to advantage for the rags, 
but probably the best substitute for this purpose is a piece of porous 
brick. In a pointed communication published in the Evening Star, of 
August 21, Major Key, agent of the Humane Society, thus describes 
the making of a brick torch: ‘Take a piece of soft brick, commonly 
