. Electric railway journal . of the tool house by an iron bracket which steadiesit during the operation. Shooting Out the Smokestack ASIMPLE method of loosening soot in a chimney,which is recommended by E. I. du Pont de Nemours& Company, and said by them to cause no injury tothe stack or lining, is as follows: One or more charges of FFF blasting powder aredischarged vertically in the stack from a cannon. Thiscan be made of a piece of old 4-in. shafting, from14 in. to 16 in. long, in the center of which a 10 in. long is bored. A i-in. hole is bored throughthe piece to the bottom of t
. Electric railway journal . of the tool house by an iron bracket which steadiesit during the operation. Shooting Out the Smokestack ASIMPLE method of loosening soot in a chimney,which is recommended by E. I. du Pont de Nemours& Company, and said by them to cause no injury tothe stack or lining, is as follows: One or more charges of FFF blasting powder aredischarged vertically in the stack from a cannon. Thiscan be made of a piece of old 4-in. shafting, from14 in. to 16 in. long, in the center of which a 10 in. long is bored. A i-in. hole is bored throughthe piece to the bottom of the center bore to serve asa touch hole for inserting the fuse. The whole thingcan be mounted on a pedestal about 6 in. in diameterso that it will stand in an upright position. The method of operation is this: The powder ispoured into the mouth of the cannon to about 2 the top and it is tamped to the collar with dryclay. The fuse is inserted in the touch hole and incontact with the charge. The cannon is set at the.
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