Replying to a message of Mimi Gallandt to Ross Cassell:

 RC>> (5) The serving of oleomargarine or margarine to students,
 RC>> patients or inmates of any state institutions as a
 RC>> substitute for table butter is prohibited, except that
 RC>> such substitution may be ordered by the institution
 RC>> superintendent when necessary for the health of a specific
 RC>> patient or inmate, if directed by the physician in charge
 RC>> of the patient or inmate.

 MG> It has nothing on topic, but when I read this I was reminded
 MG> of one of the things we had to go without during WWII.
 MG> Prior to the war margarine was white in color and you had
 MG> to get some food color additive to make the margarine
 MG> yellow like butter.

That was true well into the 1950s.  Stores were not allowed to sell
yellow margarine because of laws/rules passed at the behest of the
US dairy industry.  They had to sell white margarine along with an
included packet of yellow coloring that the customer had to mix in.
Somewhere in the mid 1950s those laws/rules were repealed.

---