A piece of useless info, but I find interesting nonetheless. Before Warren Harding became President of the United States, he managed a newspaper called "The Star" of Marion, Ohio. Some of the boys that carried the newspaper would become hoarse when shouting out "The Star!" as they delivered. So Mrs. Harding "obtained a supply of whistles that had been made of Krag-Jorgensen cartridges used in the war with Spain. Each boy was armed with a whistle, which made a very peculiar sound. After the whistle had been used for a while, all hoarseness had disappeared." This came out of The New Success magazine of January 1921.

  (You need to Login

I wonder how they did it?

From Comfort magazine, November 1898, is this reference of making bullets whistle when fired:

"Quite a consternation has often been made in the enemy's camp by the use of 'whistling bullets.' By cutting a slit and raising the tongue from the side of a bullet it makes a sharp, whistling sound as it passes through the air. The uninitiated usually seek cover when they hear these little birds sing for the first time."

  (You need to Login