APPENDICES. 129 



APPENDICES. 



ILLUSTRATIONS OF SPRAY PUMPS AND OTHER 

 MACHINES IN USE FOR THE DESTRUCTION OF 

 INSECTS. 



The object of iucluding iu Part I. of the Handbook illustrations of the 

 various spraying pumps and other insect-destroying machines now in use 

 either here or in America is that farmers, fruit-growers, vignerons, and 

 others may be able, by aid of figures and descriptions, to select for 

 themselves such articles as appear best suited for their requirements; 

 and as our rural population is in some districts scattered and so far 

 removed from the great centres of population, I have thought it 

 advisable to furnish s^ome particulars as to cost, &c., as also the names 

 and addresses of firms from whom the machines may be obtained, taking 

 them in the order in which I have received the particulars from the 

 owners or their agents; the author of each article or description being 

 responsible for the statements contained therein. 



APPENDIX I. 



spray pumps, etc. * 



Knowles' Improved Spray Garden Pump. 

 {See Fig. 1.) 



Description : Fixed in a strong galvanized pail of any capacity is a 

 brass cylindrical tube, which contains the plunger and piston ; at its 

 base is a tripoil of cast brass, in the centre of which is a ball-valve, 

 which gives ingress but not egress to the liquid to be ejected. This 

 is surrounded by a larger cylinder of brass, which has in its lower end 

 a flat valve connecting it with the inner cylinder, and on the outside of 

 the upper end is fixed a hose-pipe of indiarubber (which may be of any 

 lengtla), to which is attached "An improved spray distributor.'-' 



Action : The plunger being lifted by a stirrup-shaped handle fixed to 

 the upper end of the piston-rod, the liquid is drawn out of the pail 

 through the ball-valve into the inner cylinder. On the plunger being 

 gently pressed downwards, the liquid, not being able to repass the ball- 

 valve, is forced through the flat valve into the outer cylinder. This 

 causes the air within to become highly compressed, and the liquid is 

 driven out of the aperture at the tO]) and through the delivery hose and 

 spray distributor in the form of a fine mist, As a single lifting of the 

 plunger draws as much licpiid into the pump as can be discharged 



