Rochelle Salt

Find out much more about Rochelle Salt on my page dedicated to it by clicking the link in the bar above.

Here is a typical drugstore label for Rochelle Salt.  This was used as a laxative.

Work on the piezoelectric properties of Rochelle Salt started at Western Electric by Alexander McLean Nicolson in 1919.  Nicolson is demonstrating using a crystal for a phonograph pickup to some reporters.

His techniques were rather crude and so were the crystals he produced.  Here is a photo of Nicolson’s lab where the crystals were grown.

The Brush Development Company created methods to grow huge crystals through the 1930s and 40s.  Here is a single crystal that weighed several pounds.

They were made in rocking tanks in heated rooms to accelerate the crystal growth.  Here two young women are tending the growing crystals.

This entry was posted in Uncategorized. Bookmark the permalink.