Abstract: Apparatus for injecting liquid into a plant comprising a variable volume dosing chamber with a plunger disposed within the chamber and a chamber inlet and outlet, the inlet and outlet in fluid communication with a common volume of the chamber. The apparatus also comprises a motor and a processor. The motor is configured to drive movement of the piston plunger causing a change in volume in the chamber. The processor is configured to control voltage and power to the motor by creating a plurality of pulses of power that provide energy to said motor; to identify a change in pressure of the liquid discharged from the outlet during an injection operation by monitoring the motor current or the number of revolutions of the motor; and to vary pulse force in response to the identified change in pressure to control the pressure of the liquid discharged from the outlet.

Abstract: A bookmark or promotional device comprises a plurality of pockets aligned side-by-side with the opening of the pocket being at the edge of the bookmark. The pockets contain advertising or other promotional material as inserts. The devices are produced in different versions for different audiences and are distributed through a variety of channels generally free of charge to customers.