Replacement motor kit includes compartmentalized container having at least a motor stator (or, preferably, an assembled stator and rotor) arranged in one compartment thereof; and preselected components arranged in at least one other compartment. Motor shafts have weakened external sections, such as grooves or notches. Such sections are proportioned to permit breaking of shaft by gripping it on both sides of a notch or groove with pliers, and then stressing and breaking the shaft at the notch or groove. Plural grooves or notches may be provided.

An apparatus useful in the addition of reagents in small quantities to micro reaction systems is described. The apparatus enables liquids to be dispensed within a narrow desired area of a receiving tube or other receptacle from a needle while avoiding undesired contact with tube walls. Guide means control the position of the needle with respect to the tube. The apparatus is particularly useful in connection with a radioimmune assay system wherein radioactive labelled protein is delivered to a tube.

A subdividing structure is fitted and secured within and disposed at the bottom of a carton, box, package of similar container structure to receive and position within the container road flares for transportation storage and use. The subdividing structure is constructed either from interfitting members which together form an "egg crate" like set of compartments, one for each flare or from high density foam formed with a plurality of spaced compartments. The subdividing structure compartments are each of a size and configuration to hold a single flare and of a height such that the ends of the wire support for the respective flares are disposed above the top of the subdividing structure so that the wire ends do not trap the flares in their respective compartments or otherwise hinder removal of the flares from their respective compartments. The container is formed in box-like configuration from cardboard, box-board, plastic or the like and of a size and configuration to receive the subdividing structure and road flares when disposed therewithin. The upper lip of the container is at a height so that when the container is open the tops of the road flares are readily accessible.

A stackable tray for holding a plurality of pie pans includes four like interconnected side walls and a horizontal platform joined to the side walls approximately midway of the height of the sidewalls. The platform is provided with circular openings each dimensioned to suspend a pie pan within the opening by the engagement of the peripheral flange at the top of the pan with the platform around the periphery of the opening. Centrally located hand hold openings are formed in each side wall and upper and lower stiffening webs extend across the upper and lower surfaces of the platform between the openings.

A display tray for use in a package of mushrooms comprises an upper mushroom crown-displaying portion and a lower mushroom stem-containing portion. The crown-displaying portion includes an outer peripheral edge section and a mushroom crown-supporting surface around each of a plurality of stem-receiving holes. A flange structure extends around the edge section and defines a matrix around the mushroom crown-supporting surface. The plurality of holes defines a mushroom weight-correlated hole design whereby, when all of the holes each receives a single mushroom, a preselected total net weight of the mushrooms is substantially consistently maintained from one mushroom tray to the next. The lower stem-containing portion includes a closed, liquid impervious wall structure defining a mushroom stem-containing chamber for receiving each mushroom stem that extends through each of the holes of the weight-correlated design.