The most essential knowledge to the successful operation of a Harvester is to recognize the proper time to start harvesting. Most grain growers become anxious to start harvesting when the grain begins to show a golden hue. Grain should never be threshed until thoroughly ripe and the straw gets brittle.

Since the conditions encountered in the field are so varied that definite instructions would be of little value, the aim is to explain the effect of certain adjustments and leave it to the one making the adjustments to determine when they should be made. Determining the cause before attempting a remedy will simplify the task. Study the problem carefully before making any changes. There are four principal units in the Harvester-Thresher: The Heading, Threshing, Separating and Cleaning Units. Each should be considered individually to determine where loss of efficiency may be present.

Perfection Attained.