During the last two years we have had occasion to accurately draw and enlarge human chromosomes. Both male and female, embryonic and adult, tissues have been studied. In surveying the first or longest chromosomes of the series we were early struck by the greater length of this chromosome in the male. Five independent series of measurements have furnished invariable confirmation of the earlier o...

The proliferative response in a healing wound to a constant amount of injury offers an opportunity to study the factors that influence the velocity of growth of the injured cells. An attempt will be made to review here some of the studies on sterile wounds with reference to those factors which have been found to influence cellular proliferation, and to present the substantiating investigations ...

The application of roentgen methods to pelvimetry has been an interest in this dinic for the past fifteen years and during that time a number of communications on the subject have appeared as a result of our experience. In March, 1937, we described7 a modification of the technic for producing lateral roentgenograms, and since that time we have added this projection to our grid method of superio...

The ancient Pythagorean philosophers believed in numbers. Numbers were the key to an understanding of the world and—because they were eminently practical people—to prosperity. As we enter the information age we hold similarly strong beliefs in the benefits of digital technology: numerical representation oVers objectivity, discreteness, permanence, analytic evaluation. There has always been the ...

THIS second volume of PROGRESS IN MEDICAL GENETICS New Series, well illustrates the diversity of subjects which falls within the purview of the medical geneticist. In keeping with previous volumes, there is a mixture of articles of clinical significance, mechanisms of disease and human variation. There are six reviews by a number of authorities. One of the most interesting topics is the review ...

1. S. P. 6 Ri6rdfiin and G. Daniel, New Grange (Praeger, New York, 1964). 2. G. Hawkins, Stonehenge Decoded (Doubleday, Garden City, N.Y., 1965). 3. A. Thom, Megalithic Sites in Britain (Oxford, London, 1967). 4. G. Daniel, The Megalithic Builders of Western Europe (Hutchenson, London, 1959), pp. 111-113. 5. Actually this tumulus represents what Thom calls a type D ring, one in which the two pi...

Although surgical procedures are often performed over the posterior head and neck, surgical landmarks for avoiding the cutaneous nerves in this region are surprisingly lacking in the literature. Twelve adult cadaveric specimens underwent dissection of the cutaneous nerves overlying the posterior head and neck, and mensuration was made between these structures and easily identifiable surrounding...

We tested the performance of a process-based model (PBM) in relation to long-term mensuration data from two sites in Finland where the stands were up to 90 years old and had been thinned at approximately 5-year intervals over the last 50 years. The PBM used was based on the 3-PG (Physiological Principles to Predict Growth) model developed by Landsberg and Waring (1997), with modifications in th...