Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
Decreasing Importance of the Burgess-Body
But notwithstanding these enlargements of the powers of the burgess-assemblies, their practical influence on state affairs began, particularly towards the close of this period, to wane. First of all, the extension of the bounds of Rome deprived her primary assembly of its true basis. As an assembly of the freeholders of the community, it formerly might very well meet in sufficiently full numbers, and might very well know its own wishes, even without discussion; but the Roman burgess-body had now become less a civic community than a state.
The fact that those dwelling together voted also with each other, no doubt, introduced into the Roman comitia, at least when the voting was by tribes, a sort of inward connection and into the voting now and then energy and independence; but under ordinary circumstances the composition of the comitia and their decision were left dependent on the person who presided or on accident, or were committed to the hands of the burgesses domiciled in the capital.
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/2-03-equalization-orders-aristocracy.asp?pg=43