The occurrence of the sewage filter fly (Psychoda) at sewage works and the characteristics of the fly are descriptionbed. Thirteen cases of bronchial asthma (2 Europeans and 11 Natives) suspected of being etiologically related to Psychoda sensitivity were investigated at a sewage works in the Transvaal.
The importance of ether in anaesthesiology is stressed. The Oxford vaporiser provides a means of administration of a known strength of ether vapour, the concentration of which is directly controlled by the anaesthetist and ranges from 1-25 per cent. Very low percentages of ether can thus be delivered via the machine-a new departure in the uses and administration of ether. Attention is drawn to this relative absence of serious postoperative pulmonary complications in abdominal surgery with this apparatus. The significance of the administration of ether and air as opposed to ether and oxygen is discussed.