An automatic document feeder is provided with the first transport device and the second transport device for feeding an original at a reading position to read the original, and a curved reading path disposed between the first transport device and second transport device. Methods and structures are also provided for the utilization of ultraviolet light activated gene therapy to repairrebuild an injured intervertebral disc through the introduction of a desired gene into a patient’s spinal tissue. The vessel is connected to a flexible tube with a nozzle at one end, and the gun is adapted to receive and expel water to and from the vessel through the nozzle. In the case where a chemical cure composition is used to seal the root canal, a chemical initiator can be used to cause the mixed composition to harden over time.