Television

1931

Source: http://www.tvhistory.tv
 

1939

Here's a look at the angle some 400 households would have seen had they all been tuned into the second game of the Princeton-Columbia doubleheader on May 17, 1939.
Source: Columbia University

1941

First Televised Night Game - And Results are Amazingly Good!

This article talks about America's first NIGHT-televised baseball game, held in "mid-June" (1941) at Ebbets field.  The article isn't perfectly clear which teams were playing -- Reds and Dodgers, or Dodgers-Cardinal, or some other teams.  It goes on to say that skeptical set owners, who had expected to see dark grey figures cavorting on the field, were pleasantly surprised, for the illumination was apparently as brilliant and more uniform than natural sunshine.

www.tvhistory.tv/ 1941%20Radio-TV%20Mag.htm
 

1947

Source: http://www.tvhistory.tv

1948

Source: AdAccess