For detecting heat radiation. Made of glass with bulbs of approx. 30 mm dia, one bulb painted dark, half-filled with ether.

We are manufacturers and suppliers of the Ether Thermoscope, serving Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, the Philippines, Tanzania and Uganda.