Experimental herd

Experimental herd in feed pens. Feeding range cattle a small ration of cottonseed cake along with grass to increase calf crop and decrease loss by starvation. Jornada Range Reserve. New Mexico. United States Forest Service, Washington, D.C. Black and white images hand painted directly on glass with either transparent oil paints, aniline dyes or watercolors by colorists. Glass lantern slides were sometimes baked after painting to set paint layers.