RT Journal T1 CUrrent comment JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1939 FD February 4 VO 112 IS 5 SP 436 OP 436 DO 10.1001/jama.1939.02800050050016 UL http://dx.doi.org/10.1001/jama.1939.02800050050016 AB BLOOD PLATELETS IN ALLERGY  In a preliminary study recently reported by Thiberge,1 blood platelet counts were made on twenty-seven patients with various types of allergic disorders both during an attack and in convalescence. In the five cases of hay fever there was an average rise in the platelet count of 55,600 after subsidence of the attack, in the fifteen cases of asthma there was an average rise of about 17,000 in the platelet count and, in the three cases which failed to show a rise, one was complicated with sinusitis and two with tuberculosis. The platelet counts in the six cases of cutaneous allergy during and after an attack were, however, variable. The author reaches the tentative conclusion that improvement in uncomplicated asthma and hay fever is always indicated by a rise in the number of platelets.MITOTIC RHYTHM IN HUMAN TISSUES  The rate of cell division in normal human