Composition, Whistle : A pyrotechnic composition that when pressed into a tube with an open end burns in an oscillatory manner to produce an audible effect
NFPA 1124 Code for the Manufacture, Transportation, Storage, and Retail Sales of Fireworks and Pyrotechnic Articles, 2003 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=1124, (Code: Mfg, Transp, Storage, and Retail Sales of Frwrk and Pyrotechnic Articles - Amer) {378 NFC}