Here are a few good links for investigating various common (non-bottle) digging finds.
For lamps, kerosene heaters etc...:
http://www.milesstair.com/
http://www.earlycat.com/
https://artoluys.com/index.php/en/
http://www.aladdinlamps.info/index.htm...
I would certainly be interested in digging in Maine. I am from NY, but my Family is from Cape Ann, Mass, which I visit several times a year. I am a huge proponent of Moxie, the undisputed king of soft drinks!
Moxie was popular in NY 100 years ago, although I have never found a complete bottle...