Lami's theorem. (mechanics). When three forces act on a particle in equilibrium, the magnitude of each is proportional to the sine of the angle between the other two. 1  Facebook.
Variable reactions: Brown recluse spider's bite can cause no reaction, a mild reaction, an immediate or a delayed reaction. With a significant reaction a which blister appears after bit. The surrounding skin becomes hard, swollen & can be red, white & blue. A deep lesion can develop which can eat through fat and muscle.
1 The brown recluse spider bite usually causes some pain or burning in the first 10 minutes, accompanied by itching. 2  The wound takes on a bull's-eye appearance, with a centre blister surrounded by an angry-looking red ring and then a blanched (white) ring.  The blister breaks open, leaving an ulcer that scabs over.