In 1972 he received the Rumford Medal from the Royal Society.

He won the Hughes Medal 1934 and Rumford Medal 1940.

In 1906 Callendar received the Rumford Medal for his experimental work on heat.

Rumford Medal (for work in the fields of heat or light)

He received the Rumford Medal from the Royal Society in 1992.

Rumford Medal of the Royal Society, for his work in physical optics, 1938.

In 1990 he was awarded their Rumford Medal, and he retired soon afterwards.

He was awarded the Rumford Medal in 1892.

Among the honours he received was the Rumford Medal by the Royal Society (1966).

Presented with the Rumford Medal by the Royal Society.