OT somewhat - acid jars (and wagons)

Any chemists out there ? I'm trying to find out when the earthenware
jars for acid were last used.
I'm doing a drawing of an acid jar wagon (circa 1907) for the goods
thingy website - The drawing is currently wrong as it shows a solid
roof, which I do not think the wagon had. so I wont stick it up yet
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Second thoughts
formatting link
Shows the jars I am talking about
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