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SUMMARY1. Longitudinal tension was measured in isolated segments (approximately 20 mm in length and 2 mm in diameter) of bovine mesenteric lymphatic vessels.2. Seventeen out of thirty-nine vessels showed regular spontaneous rhythmic contractions, the most common frequency being about 2/min. 3. The strength of each contraction was related to the duration of the preceding pause, a longer pause being associated with a stronger contraction.4. Noradrenaline increased the frequency and decreased the amplitude of the contractions. This effect was abolished by ac-receptor blockade with phentolamine.5. Isoprenaline slowed the frequency of the contractions. This effect was abolished by f-receptor blockade with propranolol.6. Acetylcholine had little effect on the rate of spontaneous contractions.

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We report the case of a boy with dysgammaglobulinaemia who died with giant ccll pneumonia and disseminated measles seven weeks after receiving live attenuated measles vaccine.Case Report From tbe age of 6 weeks the patient had frequent infections associated with a rash on the face, scalp, and limbs. He was given three doses of triple antigen (diphtheria, pertussis, and tetanus) and oral live attenuated poliomyelitis vaccine; the third dose at the age of 8 months. Fifty-six days later live attenuated measles vaccine was given. One week later he developed a pyrexial illness with a skin rash. There was no known contact with measles. An elder brother had a similar illness when 2 days old and died at 7 months with staphylococcal bronchopneumonia, a cervical abscess, and boils on neck.