Hello and happy September!

It’s the 100th anniversary of U.S. respiratory protection (no, seriously, it is), and you can see bizarre historic masks as the CDC recaps the last century.

Speaking of respiration, did you know there was a huge scare in the 1890s about library books spreading disease? 

Let’s take a moment to appreciate Cornelis Drebbel and his circulating oven, one of the first constructed feedback loops. See, alchemists have their uses!