[Prof. Lancelot Hogben]

Dr. James H. Kimball

[Man and woman smiling]

no Title

[Wet mill processing iron and titanium ore, by crushing, grinding, and refining rock]

[Forest ranger locating sighted smoke on a contour map, to determine if its source is a permitted fire]

[Forest ranger broadcasting a radio alarm]

[ASPCA officer demonstrating a typical dog rescue]