484 JOURNAL OF COSMETIC SCIENCE was too large and adjustments need to be made to provide for a larger number of broken hairs to continue the hand versus mechanical combing comparison. For dry combing, as the comb advances through looped/knotted hairs long breaks can occur or as the comb descends wrapped ends can result near the tips. End wrapping by inertia and possibly static charge produces short segment breaks which are more nu- merous if the hair is cut at 90 degrees (large number of tip ends in a narrow region of tress at the tip end) versus a tapered cut. The very best practical way to evaluate hair strength is by counting the actual number of short and long segment breaks and by considering both wet and dry combing. ACKNOWLEDGMENTS We want to thank Keleigh McCallister for making mechanical combing experiments. REFERENCES (l) C. Robbins, Hair breakage during combing. II. Impact loading and hair breakage, J. Cosmet. Sci. 5 7, 245-257 (2006). (2) C. Robbins, Hair breakage during combing. I. Pathways of breakage, J. Cosmet. Sci. 57, 233-243 (2006). (3) Statistical analysis was by a modeling program from JMP 5.1 by Statistical Analysis Systems (SAS, Campus Drive, Cary, NC 27513). (4) M. L. Garcia, J. A. Epps, and R. S. Yare, Normal cuticle-wear patterns in human hair,]. Soc. Cosmet. Chem. 29, 155-177 (1978). (5) A. C. Brown and J. A. Swifr, The mechanics of fracture of human hair, J. Soc, Cosmetic Chem., 26, 289-299 (1975).