OO 



INTRODUCTION. 



powders, such as Paris green, London purple, helle- 

 bore, etc., may be applied either dry or in water. 

 When applied dry they should be dusted on the 

 plants with a bellows or " powder gun," so that they 

 will be distributed evenly. When applied in water 

 mixture the best effects are obtained by using a force 

 pump and spray nozzle. There are a great many 

 patterns of these spraying machines upon the mar- 

 ket, nearly all of 



which do effect- 

 ive work. The 

 principal requi- 

 sites of a good 

 m a c h i n e are 

 Pig. 7. spraying an Orchard. that it be dura- 



ble, easily worked, not too expensive, throw a fine 

 spray, stir the liquid automatically, and that the 

 reservoir holding the liquid be large enough for the 

 purpose intended. One of these machines in opera- 

 tion in an orchard is represented at Fig. 7. Spraying 

 pumps can be obtained of a number of firms who 

 manufacture various styles of them. 





COLLECTING AND PRESERVING INSECTS. 



The apparatus for collecting insects is neither elab- 

 orate nor expensive. One of the first essentials is a 

 collecting net, which is used for catching butterflies, 

 moths, bees, flies, wasps, and in fact, nearly all flying 

 insects. To make it, obtain an iron wire about I of 

 an inch in diameter, and bend it into a circular 



