Contents. xv 



CHAPTER V. 

 SPRAYING DEVICES AND MACHINERY. 



I. HISTORY OF SYRINGES AND PDMPS (page 181). 



Heath Brooms Watering-cans Syringes Fountain Pumps 

 Garden Engines Knapsack Tanks French Knapsack Pumps 

 American Knapsack Pumps Introduction of Barrel Pumps 

 Types of Barrel Pumps Introduction of Power Sprayers 

 Spraying with Steam Spraying with Gas Power Device for 

 Mixing Kerosene and Water. 



ii. EVOLUTION OF NOZZLES (page 197). 



Three Principles the Basis of all Spray Nozzles The Groups of 

 Nozzles History of Each Group Value of the Nozzles of 

 Each Group. 



III. BELLOWS AND POWDER GUNS (page 204). 



Hand Bellows Power Bellows. 



IV. COMPARISON OF LIQUIDS AND POWDERS (page 205). 



Advantages of Powders Defects of Powders Value of Liquids. 



V. MERITS OF THE VARIOUS SPRAYING DEVICES (page 207). 



Materials used for Making Spraying Machinery Knapsack 

 Pumps Hand Syringes Bucket Pumps Barrel Pumps 

 Cylinders Pistons Handles Air Chambers Agitators 

 Base-castings Types of Barrel Pumps Horizontal-acting 

 Pumps Spraying Eigs and Outfits Orchard Spray ing 

 Power Machines Spray Nozzles for Different Purposes 

 Character of Sprays. 



Pages 181-224 



CHAPTER VL 



THE ACTION OF INSECTICIDES AND FUNGICIDES. 



The Certainty of their Action The Time to Spray The Manner 

 to Spray Insecticide defined Fungicide defined. 



