Abstract: A pipette control arrangement consists of a housing assembly adapted for operatively housing a pump assembly and for operatively connecting a pipette to the pump assembly via a flexible air tube. The pump assembly is adapted to independently accommodate a plurality of volume specific removable cylinder-plunger systems. The pipette control arrangement may further include a quick release trigger operated mechanism for rapidly and or in large volumes dispensing liquid from an attached pipette.

Abstract: Method and apparatus for storing stacks of lumber to avoid or correct warpage utilizing two or more rectangular or square frameworks, open throughout which may include linkage for maintaining a fixed spacing of the frameworks and/or rollers for mobility in handling the stacks of lumber. A side of each framework may be hinged for opening and include a latch mechanism for securing such side from opening. Two adjacent sides of each framework each mount a force actuator having a flat face member supported within the interior periphery of each framework for engagement with the exposed surface of the stacks of lumber positioned within and extending between the two or more frameworks which upon activation of the force actuator squeezes the stack of lumber in two directions, thereby avoiding or correcting warpage during storage of the stacks of lumber.

Abstract: A pipette control arrangement consists of a housing assembly adapted for operatively housing a pump assembly and for operatively connecting a pipette to the pump assembly via a flexible air tube. The pump assembly is adapted to independently accommodate a plurality of volume specific removable cylinder-plunger systems. The pipette control arrangement may further include a quick release trigger operated mechanism for rapidly and or in large volumes dispensing liquid from an attached pipette.