The photograph on the left is a picture of the Super Sensitive Antenna that was found inside of an Eveready A-C Model 3 broadcast band receiver. On the front it gives installation instructions for an Auto, Boat, Home and Aeroplane. This antenna is actually called the "SUPER-SENSITIVE ANTENNA An All-A-Round Aerial".. The antenna container is very fragile and dry so any handling of it has been done with extreme caution. While I am not certain as to what is inside this paper/cardboard antenna container, I do imagine that it is nothing more then a coil of wire.
The photograph on the right shows a couple of old C cells. These "batteries" were made in Japan for the Kent energy corporation. Notice the bottom of the battery on the right.
A neat little battery hint is that if in a pinch all you have is "C" batteries and you are in need of a "D" battery, then simply reach into your pocket and pull out a couple of quarters. Put the quarters and the C battery together to make the needed connection until you can get the D batteries.