"It is possible to query the balance of an address using the property balance and to send Ether (in units of wei) to an address using the transfer function:"
Is this address a contract address?
I have con defined and I get this -
> eth.coinbase.balance undefined > con.address.balance undefined > con.address "0x49b0bfa8e7fc7ac178d74b73dc92fa42cd7815e5" > eth.coinbase "0x46fb9a22689c4a4bfb494baeafbb8b2993725305"
How should balance be used with these addresses?