Network commercial structures were solidly in

place but by 1935 about 1/3 of all network

radio programming was still unsponsored and

offered "in the public interest" at the

networks’ expense.

Educators thought that ratio

was insufficient

notwithstanding the fact

that network programs like the CBS “American

School of the Air” and NBC’s "Music

Appreciation Hour” (hosted by the NY

Symphony’s conductor, Walter Damrosch)

represented considerable educational

undertakings.