Many do not realize this, but before marijuana prohibition, cannabis was used medically in the 1800s and early 1900s on a large scale.
cannabis tincture as pictured was medical marijuana in its purest most effective form. It was an alcohol extraction of high quality potent bud. The bud was soaked in 100 proof alcohol for weeks in darkness, and shaken regularly.
The plant matter was removed with a strainer and the tincture was ready for sale. This stuff was administered in extremely small doses because it was very potent.
