Jim Spears Fusebox - Electrical-Photos.com FREE Photo Galleries

I have an old fuse box that blew a fuse and I am not sure how to replace it. It has a row of 4 edison screw type fuses. The middle 2 are red and say "time delay fuse 20Amp." The outter two are clear. Abbove this row of 4 fuses are two carriages side by side. The one on the left says "Main" and the one on the right says "Range." On both carriages it says "When fully in reverse for OFF." On the panel door it says its a murray manufacturing corporation fuse box. I am not sure how to get into the carriages as there is no main switch. So do I just unscrew the fuses below to kill power to the carriages? Or do I need to reverse them if thats what the writing means? Since there is no main switch do I need to make sure everything in the apartment is off before I unscrew the fuses? Or should I look for another fuse box that might have the switch? Thank you for any help or advice you can give. Jim