Illustrated Companion to the Latin Dictionary/Aes thermarum

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

AES THERMA'RUM. A metal bell or gong, which was suspended in the public baths, in order to notify to the public by its sounds when the hot water for the baths was ready. Mart. Ep. xiv. 163.

The illustration (Aes_Thermarum/1.1) shows two of these implements, from an ancient painting representing a set of baths, and which are there suspended at the windows. Blanchini,{TR: probably "Bianchini"} Instrument. Mus. Vet. tav. vii. No. 8.

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  Aes Thermarum/1.1