A siding tool is used to position overlapping siding planks. The respiration device may be designed in such a way that breathing gas can be provided for a passenger. The valve is electrically actuated and moveable between first and second positions to at least substantially prevent communication of the reference pressure source with the supplemental fuel pump diaphragm when the valve is in its second position to thereby inhibit or prevent fuel being discharged from the fuel chamber. A duty cycle control word with a second pattern is loaded into a second plurality of serially-connected registers. Journal pockets in the housing and in the intake insert surround the bushings. These fluorophores are derived from the domains of phytochromes, and in particular bacterial phytochromes.