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The Annual Report of the Central Narcotics Intelligence Bureau for 1939 contains numerous interesting accounts of investigations by which the Intelligence Bureau has been able to seize purveyors of narcotics in Egypt, the narcotics being principally hashish and opium. There are specific reports of cases in which three doctors and two chemists were concerned with the sale of narcotics. Most interesting was the discovery of a great amount of opium smuggled into Egypt in the stomach of camels, the opium being kept in a zinc container which the camel swallowed. It has been determined that it will be necessary to install x-ray equipment in the custom station through which 30,000 camels pass each year in order to make a routine study of a certain percentage of the camels in order to detect the presence of opium.
Annual Report for the Year 1939, Central Narcotics Intelligence Bureau, Egyptian Government. JAMA. 1940;115(12):1047. doi:10.1001/jama.1940.02810380077045