Eric -'[Rather noisily]' / Gerald '[quietly]'
'You're just the kind of son in law I always wanted'
'Just let me finish Eric. You've a lot to learn yet'
Contrast between Eric and Gerald - Eric is erratic due to being 'squiffy' bringing shame to the family , whilst Gerald being reserved will protect the Birling's reputation. Mature/Immature.
Highlights how Gerald is the ideal son for Birling as he echose his idealogies and improvies their social status and reputation.
Eric is viewed as naive and still needed to be Molded by Mr Birling into his rigid, Capitalist ways.