telespectroscope

Telespectroscope, tel-ē-spek′trō-skōp, n. a combined astronomical telescope and spectroscope.

The flowing gray landscape off there gave no sign of our quarry; yet we knew we could not pass it, without at least a brief flash of it in the telespectroscope and upon the image-mirror.

He was at the telespectroscope.

Frequently it gazed eastward along the tiny beam of light which issued from the telespectroscope.

Through the telespectroscope one cage was visible to the other across the five hundred feet of intervening Space when they approached a simultaneous Time; when they, so to speak, were tuned in unison.