(3) He then refers to the actinometer and pyroheliometer, instruments for measuring the actual heat derived from the sun, and also to the Bolometer, an instrument invented by Professor Langley for measuring the invisible heat rays, which he has proved to extend to more than three times the length of the whole heat-spectrum as previously known, and has also shown that the invisible rays contribute 68 per cent, of the sun's total energy.

"God gimme the grit to stick it out," begged Haw-Haw Langley in an agony of desire.

The animal must have bulked at least twice as large as the mount which had brought Langley to the mountain-side.