THE MONTHLY BULLETIN. 549 



this subject, and our own experiment stations at Berkeley and River- 

 side have men who are able and willing to give all aid possible. Pro- 

 fessor Quayle, entomologist of the Citrus Experiment Station, and 

 Mr. Geo. P. Gray, chemist of the insecticide department at Berkeley, 

 have both been of tiie greatest assistance to us in working out problems 

 which we have encountered in our experiments. 



Little data, however, seem to be available as to the cost and details of 

 constructing a plant, or the cost of making a good solution, and it is 

 this phase of home manufacture of lime-sulphur that the writer will 

 emphasize in this article. This to us was of first consideration and I 

 judge would be to any one contemplating the building of a plant. In 

 giving this information the writer hopes it will be of some practical use 

 to growers who. like ourselves, could not obtain it elsewhere ; he also 

 hopes that it will save the growers needless experimentation. 



BUILDING THE PLANT. 



The general plan of the plant is sho\Mi in the front and top views of 

 Fig. 109 and in Fig. 112. In this plan the cooking of the solution is 

 done by live steam, generated in the boiler and forced into the material 

 from the coil located at the bottom of each barrel (Fig. 110). The 

 platform is built at a height of seven feet so that the solution may flow 

 from start to finish by gravity and not reciuire dipping. A suction 

 pump (Fig. 113) is used to remove the solution from the storage tanks 

 to barrels for field use. In case one has not a pump of this kind, or 

 does not care to buy one, the platform should be raised still higher, or a 

 pit dug so that the tanks may be emptied by a syphon. 



3—20434 



