Surveying the first transcontinental railroad
I was researching the Transcontinental railway to use as an illustration. Basically how the two sides needed to come together, and if they were one degree off over time, would not have met in the middle.
But I can't find any details on line detailing the actually engineering/mapping of how the two sides were able to meet at the same place on May 10.
I have read that they were only working miles apart as they got closer, but could you point me to anything detailing how they actually mapped it to come together? ...