DETERMINATION OF HAIR RASPINESS 179 the electrical integrating system is designed to normalize readings independent of sampling technique. The disadvantages lie in the in- ability to sample a standard tress after different treatments. In one case the hair may be highly charged with static, spread out, and rep- resentative combings difficult to obtain and with other treatments the hair fibers may tend to mat together and involve more fibers than in the first case. However, this may be a blessing in disguise for these situa- tions do more closely depict actual user conditions. Several other aspects can be considered in future studies. The effects of materials of construction of combs would be of interest to comb manufacturers. This study would be feasible if the combs were produced in similar molds. The hair-on-hair versus comb-on-hair noise ratio should be explored. Our assumption that the major noise com- ponent is a result of tooth-hair interface friction may be vulnerable. In spite of apparent shortcomings the method appears to have some po- tential which will be borne out by future studies. SUMMARY 1. A method to evaluate frequencies, which are produced during hair combing, has been developed. 2. Data from the output devices may be handled statistically. 3. The method provides a basis for routine screening of hair products. 4. The method provides an additional parameter for tress quality control. (Received December 10, 1965) REFERENCES (1) Schwartz, A.M., and Knowles, D.C., J. Soc. Cosmetic Chemists, 14,455 (1963). (2) Langston, J. H., and Rainey, W. R. Jr., Textile Res. J., 24,643 (1954). (3) Thorsen, W. J., and Veneklasen, P., Ibid., 31,804 (1961). (4) Thorsen, W. J., Ibid., 32,670 (1962).

Book Reviews T}•E ART OF RESgARth, by B. E. Noltingk, Elsevier Publishing Com- pany, Inc., New York, 19(35, 142 pages, illustrated. Price $5.75. This book is aimed primarily at the "lowlier research worker" and the graduate student who is beginning a career in research. Naturally, the volume is directed to British readers but very little imagination is needed to make this book of interest to an international readership. A volume of this size cannot possibly cover methods and principles which should be followed in order to do worthwhile research at an ap- propriate pace. The author's major thesis, in this reviewer's opinion, is summarized in the following quote from this book. "He [the scientist] should, therefore, also keep himself generally educated on a broad front in preparation for what the future may bring forth." Admittedly, modern society demands a degree of specializa- tion of the researcher which, at times, certainly is undesirable. Thus, Noltingk quotes Lavoisier as follows: "Most of the work still to be done in science and the useful arts is precisely that which needs the 181 knowledge and cooperation of many scientists--that is why it is necessary for scientists and technologists to meet--even in those branches of knowledge, which seem to have the least relation and connection with one another." Two further quotes from Noltingk will serve to emphasize this point. "The all-too-prevalent attitude: 'This is not relevant to my current work I cannot afford to take notice of it.' is a vicious one." Later on, Noltingk refers to the need for extensive and broad reading in the researcher's field "the research worker must keep himself informed of world progress, both before and while he makes his o•vn contribution to it." A second point which struck this reviewer as particularly noteworthy is Noltingk's comments on criticism. It is not sufficient that the research worker examine his own work and conclusions critically to eliminate flaws and mistakes there is also a second area of criticism which ex- tends beyond the research worker's own activities. Thus, Noltingk states: "Familiarity [with other people's work] should even have bred an element of contempt! since