1900s version of Lime-Away

[markh]

Here's a neat partially labeled cure bottle, Calcura Solvent, I recently picked up. I love the claim on the label:

"For the removal of all Limestone Deposits in the Kidneys and Bladder, from the largest to the most minute formation, as Gravel,..."

Makes me wonder how close this was to the products we use to clean our bottles and bathrooms today.
Sides embossed "Calcura//Solvent"
Mark

 

[cowseatmaize]

Most likely it would work as good in your tub as on the stones. In other words, it'd do nothing.