n the annulus. The outer The dotted circle is the lens aperture. The shutter is rollers consist of similar disks whose trunnions bear The plow is constructed with two beams joined at fan-shaped, pivoted near the apex. Just in front of their front ends and diverging as they extend rear- upon the… … European countries with their enormous population to ROSS’ IMPROVED PLOW. support produce 600,000,000 bushels, and the United Kingdom only 54,527,000 bushels; Argentine, which is wardly. These beams are adjustably connected near so often quoted as being sugh a great wheat-producing their rear ends…
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