This invention, used to eavesdrop on the bad guys in the Old Huntley place, consisted of a long hose. On one end, Alvin taped a large funnel. On the other end, the hose was fastened to the ear flap of his old aviator's helmet.
"'What's the hat for, Alvin?' asked Shoie. 'Couldn't you just hold the end of the hose against your ear and hear just as well?'
The great inventor
spoke to Shoie in the same tone he frequently used on the Pest. 'That'd
be some invention, wouldn't it. Every time you wanted to listen you'd
have to hold a hose against your ear. Some invention!' He shook
his head."
