Extract from the Minutes of the Academy of Natural Sciences of Philadelphia; Feby 2, 1819.
‘Dr Hare read a paper on a new instrument by which he considers that it is shewn, that the heat produced by the Salvanie apparatus, is not the effect of electricity; but a collateral result of the laws which produce the motion of this fluid.
‘Twenty copper & twenty zinc plates were supported vertically in a frame of copper & zinc, alternating at half an inch distance from each other; & the plates of the same kind of metal are soldered to strips meeting together; so that one set of plates forms a continuous metallic superficies.
‘When the copper & zinc surfaces thus formed, are united by an intervening wire; & the whole immersed in an acid or aceto-saline solution, in a vessel devoid of partitions; the connecting wire becomes intensely ignited: and when the hydrogen is liberated, it is very often inflamed.
‘The instrument is termed Calorimotor, & & the process calorimotion; in contradistinction to Electromotor & Electromotion!
NB. This minute was substituted for one registered at a former meeting.
DLC: Papers of Thomas Jefferson.