1 entry 1 source
Actinograph
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
An instrument for measuring and recording the variations in the actinic or chemical force of rays of light. Nichol.
1 entry 1 source
Part of speech: noun (n.)
An instrument for measuring and recording the variations in the actinic or chemical force of rays of light. Nichol.