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.
It has a violin shape on the dorsal cephalothorax. The venom in the brown recluse spider is a mix of phospholipases and proteases (e.g., sphingomyelinase D), which results in severe clinical signs. However, there is tremendous variability of the strength of the venom.