the Aitaclis oj Insects and Fnnr/l. 
233 
hand. This does not move a piston as in ordinary pumps, bat 
acts upon an india-rubber diaphragm, by whose sucking action 
the liquid is forced up through 
the deliveiy tubes with great 
force. With the Yermorel or 
the Riley nozzle the liquid can 
be delivered in the finest spray, 
or almost in single jets, and in 
any direction. For high trees 
the delivery hose can be length- 
ened by light canes and dn-ected 
by a boy. The machine will 
throw a spray from 20 to 25 feet, 
and a jet 30 feet high. It weighs 
about 40 lb. when full. The cost 
is 356\' 
Onion crops, a source of much profit to market-gardeners, 
suffer greatly from the onion mildew (Peronospom Schleideniana). 
Sulphate of copper solutions will prevent this attack if put on 
onion plants for seed at the end of May, and on onion plants for 
bulbing just as the bulbs begin to swell. 
One of these is a bouillie hordelaise, composed of 
5 lb. of sulphate of copper (bliiestone), 
21 lb. of quicklime, 
22 gallons of water. 
One mode of preparing this is to dissolve the sulphate of 
copper in a wooden vessel in thi'ee gallons of boiling water. In 
another vessel the lime is put with four or five pints of water, 
and when slaked four gallons of water are added and the whole is 
well stirred. This is then poured into the tub containing the 
sulphate of copper, being passed through a sieve to keep back 
the particles of lime. The whole is well stirred and the rest of 
the water is added. 
Another and a weaker preparation, prescribed by a practical 
vine cultivator in France, as suitable for the potato mildew, is 
3 lb. of sulphate of copper, 
1 lb. of quicklime, 
20 gallons of water. 
The sulphate of copper should be allowed to dissolve in cold 
water by hanging it in a coarse bag or basket in a tub. In a 
separate tank the quicklime is slaked and passed through a sieve 
' The Eclair is sold in London by Messrs. Clark k Co., Windsor Cham- 
bers, 20 Great St. Helens, E.G. 
VOL. 11. T. S. — 6 B 
