Offered here is an original 1900's Assayers Reagent Bottle that once contained Ammonium Chloride (NH 4 CL) that measures 4.25" tall not including the glass stopper. Reagents were used by assayers during the process to ascertain the amount of precious metals, such as Gold and Silver, was in a ton of ore. A great display piece of mining and assaying history. Thanks for looking!