Box Cover Research Articles

No Injury Damages for Fall Over Meter Box

A Louisiana appellate court ruled that evidence concerning debris on a water meter box cover was insufficient to support a pedestrian's claim for damages against a water utility.

The Domino Effect: Problem Solving with Common Table Games

One day I walked into my principles-of-mathematics class and held up a box of double-9 dominoes. “How many dominoes are in this box?” I asked. “Can you tell me the answer without reading the box cover and without dumping them out and counting?”

Improved staining boxes for fast, uniform staining of ultrathin sections on grids.

A standard LKB (LKB-Produkter Ab. S-161, 25 Brommma 1, Sweden) grid storage box is converted into several grid staining boxes by sawing the body of the box into segments along rows of its grid storage cavities. The staining boxes can be cut out to any required size or shape. The polymethyacrylate storage box cover is discarded. Covers for the staining boxes are cut from thin sheet vinyl, which is more chemically resistant than polymethyacrylate. Corresponding 2 mm diameter holes are drilled through the vinyl covers and the bottoms of the grid storage cavities of the staining boxes to convert the storage cavities into staining chambers. For staining, the covers are tied to the boxes with sewing thread and the assembled units are put into vials. The separate staining chambers prevent intermingling of and mechanical damage to grids during the staining procedure. Ultrathin sections are more cleanly and uniformly stained in bulk by the use of these staining boxes than they are when stained individually by a standard method.

A DESICCANT-HOLDING SLIDE BOX FOR RADIOAUTOGRAPHIC EXPOSURE.

A double-depth plastic slide box is made by removing the bottoms of two standard 25–slide boxes and cementing the remaining frames together, bottom to bottom. A desiccant is placed in one box cover and fitted to the lower section of the cemented unit. A piece of screening is placed over the desiccant, the upper section filled with slides for radioautogaphy, and the empty cover applied to the top of the assembled box. Thus all slides are kept effectively and uniformly dehydrated during exposure.