Question on batteries. Help!

[Guest guest]

I remember many years ago I took two flashlight batteries and wired them so the

plus sides were connected and the two negative sides also connected after

putting a a bulb in the circuit., in other words in series and when conected to

the flashlight bulb it lit up very brightly. Because there were 3 volts instead

of one and a half. I recently tried this with two c batterys and the bulb did

not light up at all! The bulb lit up fine in the normal configuration but not

when the batteries were wired to give 3 volts. It did not work with two used

batteries and I got two new c batteries and it still did not work. Can someone

explain? I need 3 volts DC for two interesting projects and I was using the

bulb to test the circuit. But why does it not light?. Trevor