Read CHAPTER XIV of Project Mastodon , free online book, by Clifford Donald Simak, on ReadCentral.com.

He was. Not he alone, but a thousand others, working desperately, knowing that the time was short, working not alone for two men trapped in time, but for the peace they all had dreamed about that the whole world had yearned for through the ages.

For to be of any use, it was imperative that they could zero in the time machines they meant to build as an artilleryman would zero in a battery of guns, that each time machine would take its occupants to the same instant of the past, that their operation would extend over the same period of time, to the exact second.

It was a problem of control and calibration starting with a prototype that was calibrated, as its finest adjustment, for jumps of 50,000 years.

Project Mastodon was finally under way.

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