Flour fire ball

As well as the flour bomb, use a long piece of very wide bore glass tubing
with a fine piece of fine copper mesh shaped and placed in one end. Place a
teaspoon of flour down the tube to rest on the mesh. Aim into a blue bunsen
flame and blow down tube to blow flour out of mesh. Should result in a large fireball!

Safety Precautions

Sound fairly dangerous. Would the original author or someone who has done
this demo add some safety precautions please.

Note

Flour mills have been destroyed when a flour-air mixture ignited
explosively. While flour is difficult to burn on its own, when it is turned
into a dust cloud in the presence of a flame it will combust rapidly due to
the large reactive surface area that is exposed. Similar reactions can occur
with a number of other fine combustible powders. e.g. sawdust, coal dust,
grain dust (in grain elevators) and some metal powders.

How to - Physics - History - Companies - Internet - Video Games - List of Phobias - September 11, 2001
Radio - Timelines - Chemistry - Genealogy - Family - Film - SARS - Cancer - Medicine - DVD - Calendar
Countries - Disease - Health Science - Dentistry - Economics - AIDS - Law - Autism - Statistics - Bible
Recipes - Architecture - Computers - History of the Internet - Personal computer - Apple Macintosh
War - Presidents of the United States - United States Constitution - Universe - Philosophy - Animals
Biology - United States Constitution - Marketing Topics - Sports - Television - History of Computing

Mortgages - Mobile Phones - Car Credit - Wedding rings - Art Prints