Show accuracy of base measurements th alie L I 1 tench fionch mission to reine asnie the I 1 ian at OIL c of the merld an all llis has just completed the measurement of a 1 base s e line about tN twelve ele kilometres kilo metres sei fe on en miles long at wo rio A avit pirt L of the base about four our hiloni kilometres kilo metres etres two and a halt half miles long was mas mca surd on two tk diffrient occasions the bet between cen the ho two tuo meas ure ninta was nas sen se n millimetres milli metres that Is ahi abi ut tit one third of an all inch the babu ement cements eie nide liy by bars four fatir that is about aboia n att fi 11 an ling g placed end to end the it ri iiii in the two tuo mea ments NN ts is about one fi anve thousandth part of per cent of the length mons are arc I 1 |