- 2 =. 



scab control, the grower should apply a fungicide before the hours for the fungi- 

 cide have run out. 



A grower will need to use some judgement in deciding vrhether to depend on the 

 hours in the table or whether to adjust them. For example, if the temperature at 

 the beginning of the infection rain is 50°F and 2 or 3 hours later rises to 55<^ 

 or higher, he would be safer to use the hours «t the higher temperature and would 

 have a shorter time to apply his spray. Conversely, if the temperature drops 

 shortly after the rain starts, he would be reasonably safe if he took a longer 

 time to apply his spray. The smart grov^rer will not take chances but will apply 

 his sprays either before the rain starts or as soon thereafter as he can even if 

 he needs to spray in the rain. 



*^rhese materials are strictly protectant materials and must be applied before 

 the hours for them run out. NOTE that they have the shortest infection time of 

 all the materials listed. 



C. J. Gilgut 



ELECTRIC MOTOR MAINTENANCE 



Years of satisfactory service from the electric motors used on the farm or In the homo 

 practically Is assured when you provide a minimum of care and maintenance. This care 

 consists of cleaning, lubricating, storing, and for Chose motors so equipped, caring 

 for the brushes and commutator. 



ClganlnR . Electric motor enemies are ! (1) dust, 

 (2) excess oil, (3) moisture. Dust fights lub- 

 rication. Every minute of every day, dust Is 

 settling on motors — on housings, on windings, 

 on slip rings and commutators -- trying to work 

 Its way Into bearings. Oh windings, dust acts 

 as a layer of Insulation, confining heat until 

 It may reach dangerous temperatures. Dust also 

 plugs ventilation spaces further Interfering 

 with proper cooling. Otice Inside bearings, dust 

 can be as harmful as sandpaper to the highly pot 

 lohed surfaces. If allowed to fill up the open 

 spaces In windings. It turns the whole wound sec- 

 tion into a sponge for soaking up harmful oil, 

 moisture, acid fumes, etc. 



THist "blankets" a motor with 

 a layer of Inoulotlon, caus- 

 ing heating. 



rhe time to catch dust In motors is before It has had a chance to unite with oil or 



water to form a gummy mess. 



Oil Is quick to attack In- 

 sulation v/hen It reaches It, 



That means wiping off the motors on regular inspections 

 -- their housings, slip rings, commutators, and occasion- 

 ally blowing dust out of the end bells with fairly low 

 proosure. A vacuum cleaner la a good t>ource of air under 

 sufficient prcooure for this purpose. Use the suction 

 end first to withdraw ao much dirt as possible. Use the 

 pressure end next to force air and dust through to the 

 other side. 



Useful oil inside of the bearings is the life blood of 

 motors; outside the bearings, oil Is strictly poison. 

 Oil catches dust. Just as flypaper catches flies. Chco a 

 winding la thoroughly oil soaked, the motor Is In immedi- 

 ate danger of a bum out or a breakdown. 



