Barium Perchlorate is an extremely hygroscopic salt, to the point of being used an a commercial desiccant, and should not be used in any pyrotechnic compositions.
Pretty much anything you would ever want to know about bickford fuse, its history and manufacture, can be found in the book Cornish Explosives by Bryan Earl, published by the Trevithick Society.
The actual correct term is Paloma, which is spanish for dove. The polumna spelling came about from some "kewl bomz" type document that was spread around the internet during the early 90's.
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