What is the version of the following sentence with correct punctuation?

His paper On Faradays lines of force was read to the Cambridge Philosophical Society in two parts 1855 and 1856 Maxwell showed that a few relatively simple mathematical equations could express the behaviour of electric and magnetic fields and their interrelation
His paper On Faraday's lines of force was read to the Cambridge Philosophical Society in two parts, 1855 and 1856. Maxwell showed that a few relatively simple mathematical equations could express the behaviour of electric and magnetic fields and their interrelation.