One clinical study looking at essential oils for treating children with eczema found that massage with and without essential oils helped improve dry, scaly skin lesions. Children with this scaly, itchy skin problem seem to have less redness, scaling, and other symptoms if they had massage between flares.
Serial numbers on firearms in US were made mandatory by the Gun Control Act of 1968.
Most gun manufacturer's have some sort of numbering system to the serial numbers of the firearms they produced. This could include the model or the gun, caliber, level of finish and the year and sometimes even the month of manufacture. Unfortunately, each gun maker has their own system.