Charles Evans Hughes, Borden's Farm Products Co. v. Baldwin…
“ We have here a novel, if not a unique, provision. The legislature does not purport to exercise an authority merely to fix prices, or minimum prices, or to make different prices for different grades of milk, but attempts to establish for the respective dealers different minimum prices for the same grade of milk, bought and sold at the same time and place and under precisely the same conditions aside from the use of a well advertised trade name. ”
