ORIGINAL: BillinMo
Nice finds - high voltage power glass isn't easy to find these days. Hope you're able to keep searching that area and turn up more.
I think the one on the left is a CD 302, what Hemingray called the "Muncie Type". Does it have a 7 inch diameter? Sometimes camera angles can make it tough to judge the size, and there is a larger Muncie that's 9 inches wide, which is a CD 303.
The one on the right is a CD 282, based on the Converse design patent - HERE is a link to the patent info. Several manufacturers made these, and I can't make out any embossing in your photo. If you can provide that info, we'll be able to tell you more about it.
ORIGINAL: JGUIS
Go back with a pitchfork. Push it in the muck slowly, like 4 little probes. Works great in swampy areas.