-4- 



2» Valves, plungers, bcai'int-ju, ^jears, drive chains, etc.j should be 

 examined and worn or broken parts replaced. 



3. Check pur.ip. Replace valve seats and balls if worn and pitted. Replace 

 punp cylinders if badly worn. Fnon takinr punp apoi-t mark bearing caps 

 so that they :.3.y be replaced in sairie position as they were originally. 

 Repack plun£;er if necesssiry. 



4. Check pressure regulator. Check valve seat and ball. Check setting of 

 sten below the ball. There should be l/l6" clearance when pressure is 

 off. Replace packing around stem. Oil sprin^, adjustment nuts and all 

 Moving parts. 



5. Check engine. Remove carbon, g-rind valves, adjust tappets, take up 

 bearings, clean or replace spark plugs. Have niagneto checked by author- 

 ized service station if necessary. If piston rings are badly worn 

 replace or have cylinders rehoned if oversized rings are needed. 



6. Replace pipes v/hich have becoue very rusty on the inside. 



7. Ilake sure that strainers are in good cdidition. 



8. Be suro that drive bolts oiid chains are in proper alignment. 



9. Grease agitator bearings v;ith v/ater pu:r,p grease. 



10. Check spray nozzles to r.iake sure that they arc in proper working order. 



11. Be sure that hose is properly rinsed out with clcair water, drained and 

 coiled. Store in dry location av;ay fron artificial heat and sunlight. 



12. C-roase or paint all metal parts that axo likely to rust. 



13. Order extra parts such as nozzles, discs, etc., which may be needed 



during the spraying season. 



0= C= Roberts 



Hormones and the Dropping of Fruit 



There is considerable popular interest in hormones at the present 

 time v/ith a tendency on the part of iiany to believe that Utopia for agricul- 

 ture can be reached via the mysterious hormone route. This belief is based 

 on the tremendous progress made in the past few yeai's concerning the nature 

 of hormones and their manifestly universal piresence aiid importance wherever 

 life exists. 



Plant gro\=/'th substances, variously called grovrth hormones, grov/th 

 regulators, grov/th enzymes, phytohor .lones aaid auxins, are definitely knov/n 

 to occur in plants in very i.nnuoe quantities. In fact, they are essential 

 for norm.al cell enlargement aiid recently have been shown to influence fruit- 

 ing processes. Further, it has been fomid that the substaiices which are 

 essential for the grov.rth of plant parts above the ground often inhibit root 



