foot level

He was working that day on the one-hundred-and-ten-foot level; he was an experienced man and counted sure of foot.

The superintendent was at the time on the twenty-four hundred-foot level.

The Atlantis was spiralling up to her ten-thousand-foot level, and in a moment or two she was nothing more than a speck.

"Yes, we have descended to the twenty-five hundred foot level," remarked the Professor, after consulting the barometer.

They had lowered to the five hundred foot level, so that a good view might be taken of the beautiful metropolis of Ohio—Cleveland.