Abstract: Apparatus for preparing a smear of a biological fluid substance containing cellular material on a first element having a surface for receiving the smear, utilizing a second element coacting with the first element. The elements are supported so that at least portions thereof are in close proximity to one another at a sample-applying station. A relatively small quantity of such biological liquid sample is introduced between the aforementioned element portions at the sample-applying station for spreading of the sample across at least the central portion of at least one of the aforementioned elements. The sample is spread or smeared on the aforementioned surface of the first element by moving one of the elements relatively to the other. The sample is mixed at least during the drawing of the sample so as to obtain a random distribution of such cellular material and enhance spreading such cellular material in a direction normal to the drawing of the sample.

Abstract: A roller and mount assembly contained on a movable carriage, the mount adapted to allow the roller to pivot in at least one major direction in response to non-uniform transverse contact between the roller surface and the surface to be contacted.

Abstract: A binding machine for binding sheets in a stack by the application of glue along one edge of the sheets. The binding machine incorporates a manually operated clamp mechanism to hold the sheets together with sufficient compression to maintain the proper alignment of the sheets for the application of glue to the sheet edge.

Abstract: A hand-held unit carries a cue chalk cube and includes a power source for oscillating the cue chalk cube in a substantially rectilinear path. On the other end of the hand-held unit from the cue chalk cube is situated a talcum powder dispenser. A file for dressing the cue tip is attached to the outside of the unit.

Abstract: An apparatus for gluing a stack of aligned sheets into a pad or book with a molten adhesive, comprising means for clamping said sheets with the aligned edges to be glued facing downwardly, a crucible for adhesive, means for melting said adhesive in said crucible, a glue applicator roll dipping into the molten adhesive in said crucible and extending above said adhesive, and means for effecting relative movement between said clamping means and said crucible with said applicator roll, whereby said applicator roll applies adhesive to the aligned edges of said sheets. The crucible and applicator roll, preferably with an upstream air blower, are desirably positioned between a pair of parallel endless chains which are moved below the stationary sheets.