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...
Post photos of your NY area porcelain stoppers
I already have photos of the following (but post them anyway in case there are multiple addresses or versions.)
Obermeyer & Liebmann
A. Krumenaker
Jacob Ruppert
Hobby Bottling Co., Mt. Vernon
The Deer Park Brewing Co., Port Jervis, N. Y.
Briarcliff...
I'd forgotten that there was a codd of D. H. Smith! I've found several D. H. Smiths, but only recently I found what I believe is part of that type of bottle. I imagined that it must belong to a blob ginger-ale bottle, but now that I see the shoulder area I see that it is clearly a codd. Very...
As someone who is interested in history, I'm personally interested in seeing variations in bottles over time.
This means that the most frequent (& worthless) bottles are the best ones to demonstrate changes over many years. If you find a hoard of worthless jars, jot down the makers marks...