Found a few marbles down a ways at an old site

[black651]

I'm under no illusions that these are valuable or anything but I am curious as to what company made them and when. Most of the items I have dug near these have been from the early 1900's through the 1940's. The two on the right look like some marbles I have seen on a website that had photos of "Vitro Agate" marbles but I thought I'd post them here to seek some expert opinions. The one on the far left is so beat up I don't think an ID is even possible.

Thanks in advance for any information you can offer!

[Road Dog]

first one is a slag marble. second is a Master marble. third is a Peltier marble.

[black651]

Thanks very much for the IDs!!