APPENDICES. 133 



Mr. Crawford, continuing, explains as follows: " Having had several 

 of these nozzles made by Mr. Boettger, of Adelaide, I recommend 

 the following modifications as advisable for reasons which either sug- 

 gested themselves while experimenting with them, or proposed by 

 Mr. Boettger for cheapening their manufacture: The part a (figure 7) 

 to consist of a solid brass rod about IJ-inch long and -inch diameter. 

 Through this to be bored a hole, so that the inlet k is about 3^- inch 

 diameter, so as to be tangential to the inside of the chamber when 

 brazed thereon. The diameter of the inside of the chamber should not 

 be more than -g-| inch, and its depth ^-inch, while its walls should 

 be at least ^--inch thick, so so as to allow an indiarubber washer to rest 

 on the top and prevent the screw-cap from leaking. The outlet s to be 

 about gV-inch in diameter, with the outer part bevelled off much more 

 than shown in the figure, so as to enclose nearly an angle of 90. The 

 screw of cap c need not be carried down to the bottom, as shown in 

 the engraving; a depth of ^-inch, with an indiarubber washer, is suffi- 

 cient to keep the top firm and free from leakage. 



" In using this apparatus the orchardist is cautioned to have the solu- 

 tions for spraying carefully strained through linen, muslin, or cheese- 

 cloth, or other similar material, as owing to the very small exit hole of 

 the nozzle it is very easily choked. For the same reason the suction 

 hose of the pump should have its entrance guarded with fine wire 

 gauze." 



Messrs. McLean Brothers and Rigg are the Melbourne agents. 



THE " STRAWSONIZER." 

 (See Fig. 13.) 



This machine is a new kind of distributor for applying, by air-power, 

 liquid or solid insectifuges, and for broadcasting all kinds of grain, seed, 

 and chemical fertilizers. The material to be distributed should always 

 be in a free and dry condition, so as to pass evenly over the feed roller. 



We extract the following as a good description of the machine from 

 the Agricultural Gazette (British) of May 20th, 1889. It is a descrip- 

 tion of certain trials made at Windsor, England : 



"Two machines were ready for trial, one fitted for distributing 

 liquids, and the other for solids. The same machine will do all kinds 

 of work, and the only reason for using two was to save the time that 

 would otherwise have been occupied in changing the fittings. The 

 machine is a light one for one horse, and is constructed in great part 

 of wood, mounted on two iron wheels. The distributing power is ob- 

 tained by a blast of air produced by a revolving fan, worked by the 

 travelling wheels of the machine. As the material falls from the hopper, 

 it is caught by a blast of air, and spread from the back of the machine. 

 For solids a metal spreader is fixed, while liquids are sent through nozzles 

 placed in different positions for various purposes. 



" The first trial was intended to illustrate the spreading of a liquid in- 

 secticide over the ground, paraffin being used for the purpose at the rate 



