The coloured streak of light merely got in the way and indicated that the specimen was out of focus.
For this reason it was ruthlessly eliminated with a single turn of the knob, which spread an even white light over the plate.
The zoologist's long fingers had already tightened on the knob, when suddenly they trembled and let go.
The reason for this was Persikov's right eye.
It tensed, stared in amazement and filled with alarm.
No mediocre mind to burden the Republic sat by the microscope.
No, this was Professor Persikov! All his mental powers were now concentrated in his right eye.