First Steps, after Millet (1890) by Vincent Van Gogh. Original from the MET Museum. Digitally enhanced by rawpixel. Free Image from public domain license 
Auguste Lanteigne proposes a system of airship navigation utilizing a series of 16 balloons on a single keel. Original from… Free Image from public domain license 
The fruit grower's guide : Vintage illustration of barrows, basket, ladder, scraper, steps Free Image from public domain license