Ah, the early 1900s. It was a simpler time, when men were men, women baked apple pies, and magazines gave everyone information on how to accidentally blow themselves up.

Floyd W. Darrow: Creator of hand burns across the USA. (via Popular Science)

Since the late 1800s, the magazine Popular Science has empowered ordinary Americans to master the powers of craft and science. Hopefully without mortally wounding themselves in the process. Now, I'm all for letting people get dirty and do things that aren't safe (just imagine that I've inserted a rant about how we're overprotective with our children here), but homemade explosives seem... ill-advised. And Popular Science knows it. In their the September issue of the previous year, they published this:

Sources: Popular Science on Google Books