Wiring silicon diode and resistor

[jln1966]

I am working on a 1959 Zenith table radio. I am replacing the selenium rectifier with a diode and resistor. What is the proper way to wire them in? Are the resistor and diode wired id series? How do you tell which end of the diode is + and -? Also there is a .047 bumblebee cap connected from the + side of the rectifier to the chassis. Is the cap required with the diode or can it be eliminated?
Thanks,John