from The Century Dictionary.
- noun A thermometer in which air is used instead of mercury.
Sorry, no etymologies found.
A new air-thermometer has been invented by M. Pouillet, for the purpose of measuring degrees of heat in very high temperatures; an object hitherto of very difficult attainment.
The apparatus is, in a word, a large air-thermometer, inside the bulb of which the subject is sitting.
Put another kind of test of heat beyond it and it appears; coat the air-thermometer with a bit of black cloth, and that will absorb heat and reveal it.
Watch your air-thermometer, on which the beam of heat is pouring, for the result.
While incompetent to produce the faintest glimmer of light, or to affect the most delicate air-thermometer, they will inflame paper, burn up wood, and even ignite combustible metals.