Add punctuation to the following sentence: The northern part was much the longer since it had been accurately measured by Cassini de Thury in 1740 Delambre was given charge of the Dunkerque to Rodez sector and Mchain the Rodez to Barcelona sector much of which had not been previously surveyed
The northern part was much the longer since it had been accurately measured by Cassini de Thury in 1740. Delambre was given charge of the Dunkerque to Rodez sector and Mechain the Rodez to Barcelona sector much of which had not been previously surveyed.