Replacing formalin in a wet mount box.
Don’t know the exact origin of this photograph, but it was used in a manual for maintenance of dry and wet mount museum specimens.
1914 - WWI Gas Masks - Human and Horse.
I heard that the WWI horse gas masks had these odd blinder-like goggles, but I’ve yet to see a picture of one. It would make sense that you wouldn’t want your horse going blind, but it seems pretty difficult to make functional goggles that you could put on a horse in short order. The gas mask, though, you just slip over the nose and tighten the cinch. Much easier.
Bosk’s Fringe-toed Lizard (Acanthodactylus boskianus)