Archives by date

You are browsing the site archives by date.

1945: Weather Backgrounder

Sometime, probably during June, meterologist Jack Hubbard compiled a list of desired and undesired weather conditions for the atomic bomb test (a result of a poll he took among various Manhattan Project scientists for best conditions). Best conditions for the operation: Visibility greater than forty-five miles. Humidity below 85 percent at all levels. Clear skies. […]

1945: A coded invitation to attend the test

Oppenheimer sends a telegram to Ernest Lawrence. (Lawrence is located at Cal Berkeley, and before being hired for the Manhattan Project, Oppenheimer also taught at Berkeley) Any time after the 15th would be a good time for our fishing trip. Because we are not certain of the weather we may be delayed several days. We […]