Abstract: Refractive index matching (RIM) formulations, their use for mounting biological specimens (e.g., cells and tissues) to a substrate, and methods of visualizing biological specimens embedded in RIM formulations are described.

Abstract: In accordance with the present invention, a playground carriage (10) is provided for moving people (100) from one play area to another. The playground carriage comprises a rotatable support pipe (12) having a first end (14) and a second end (16). The support pipe extends between a first vertical column (18) and a second vertical column (20). A manually-operated crank extends between the first vertical column and a third vertical column (48). The first end of the crank is coupled to the first end of the support pipe so that manually turning the crank rotates the support pipe. A carriage (28) for carrying people is mounted to the support pipe. The carriage is advanced along the support pipe by a carrier assembly (102). The carrier assembly comprises a carrier (30) which propels the carriage and a brake (104) which is capable of bringing the carriage to a stop.

Abstract: A bucket bracket which is easily secured to a wall or other vertical support is disclosed. The bucket bracket is capable of ease in engagement and disengagement of a bucket for the user merely slips the bucket rim between the vertical mounting support and a curved bracket, whereupon the user lowers the bucket until it rests on the ledge of the bucket bracket with the projecting rim of the bucket secured between the mounting support and the lower curved flange.