Inscription: On central plaque, painted on astrolabe: MARS/ AVRIL/ MAI
On thermometer scale, at top: THERMOMETER/ FAHRENHEIT
On scale, on both sides of thermometer: Fever/ heat, Blood/ heat, Sumer/ heat, Tempe/ rate, Freez/ ing
Marking:  Interlinked L's, Sèvres mark, with k in center, for Dodin (worked 1754-1803) (see image)
 L beneath Sèvres mark, probably date letter for 1764
Marks located on underside of central plaque.