1. The factors influencing blood conductivity have been noted. 2. An accurate apparatus has been designed to measure blood and plasma conductivity. 3. A new cell has been designed to measure conductivity of blood. 4. Through studies on normal blood before and after dilution, a correlation has been shown to exist between blood conductivity and the red cell count. 5. The form factor for normal human red cells has been determined to be 1.393. 6. A mathematical equation is presented relating red cell count with conductivity for normal blood. See PDF for Equation 7. The factor C on the basis of 33 determinations has been calculated to be 10.80.

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1. The blood and plasma conductance was measured in 157 blood samples. Of these, 101 were from hospital patients with a variety of clinical conditions, 33 were from normal individuals, and 23 were unclassified. 2. Blood counts were done on the same specimens. 3. An empiric equation, was found to give the red cell count from the conductivity measurements, wherein C1 = 10.49, and g is in millions per cu. mm. See PDF for Equation 4. A nomograph is presented to simplify the calculations of the red cell count.

Two cases of the Churg-Strauss syndrome are reported, seen within the past year. The first concerned a 31-year-old woman with a rapidly progressive illness characterized by bronchial asthma, leukocytosis and eosinophilia, abdominal pain, diarrhoea and purpura. In the second case, a 47-year-old man had granulomatous epididymitis and interstitial nephritis before the asthma and eosinophilia developed. In both the diagnosis was confirmed by lung biopsy. Immunosuppressive treatment achieved rapid regression of all symptoms and of the eosinophilia, without recurrence so far.