Recently I have found a few bottles (medicine, vinegar?, serum) which still have some form of contents. Is there a way to get these contents tested to see what they are relatively cheap? The two serums I dug up still have a bit of yellowish liquid in them. A half-gallon turn bottle and a screw top vinegar were found in a crawl space of 120+ year old building and have brownish liquid in them. Turn medicine still has the cork.