What was the daily dose limit recommended in 1934 for radiation exposure?

The recommended daily dose limit for radiation exposure in 1934 was established at 0.1 roentgen. This guidance emerged from earlier assessments of the potential biological effects of radiation on human health. The limit was set at a level that aimed to minimize the risk of radiation-related health issues while allowing for necessary exposures in medical and research settings.

During this period, understanding of radiation and its effects was still developing, which is reflected in the establishment of relatively conservative dose limits. The value of 0.1 roentgen was derived from initial observations concerning the safety of radiation workers and the need to protect them from potential cumulative effects of repeated exposure. This figure was an early attempt to balance the benefits of radiation use in various applications while ensuring the safety of individuals involved. Over time, as more research was conducted, these guidelines would evolve to reflect an improved understanding of radiation safety and its implications for health.