Jacopo Bartolomeo Beccari FRS (25 July 1682 – 18 January 1766) was an Italian chemist, one of the leading scientists in Bologna in the first half of the eighteenth century.

Jacopo Bartolomeo Beccari was born in Bologna on 25 July 1682.

He carried out important research on the phosphorescence of bodies, and studied the measurement of the intensity of the light emitted[1] (De rebus aliisque adamant in phosphorum numerum referendis, 1745).

He also studied the action of light on silver salts (De vi, quam ipsa per se lux habet, non colores modo, sed etiam texturam rerum, salvis interdum coloribus, immutandi, 1757).

Working at the Academy of Sciences of Bologna Institute, Beccari looked for ways to make populations resistant to famine through a new type of emergency diet.