A sanitary napkin includes a main body having a liquid-absorbent layer for absorbing and retaining liquid and a projection disposed on a body surface of the main body. The means may include hardware and software features. This cyanide-free reagent could be used solely for hemoglobin determinations, or, it can also be used in leukocyte counting and sizing using hematology instrumentation. This design capitalizes on the safety and reliability of existent circuit breaker designs. The wall mounting device for liquid crystal display of that uses brackets to reduce the number of mounting pegs used in the liquid crystal display so as effectively lower down the cost and enable the use of a thinner back frame for the liquid crystal display.