Who demonstrated the first known artificial refrigeration in 1748?

The first known artificial refrigeration was demonstrated by William Cullen in 1748 at the University of Glasgow.1

Cullen achieved this by allowing ethyl ether to boil into a partial vacuum; however, he did not apply the result to any practical purpose. While this demonstration marked a significant milestone in the history of refrigeration technology, practical mechanical refrigeration systems were not developed until the mid-19th century.1