A critical examination of the concepts and assumptions regarding radiation fields and their interaction with matter underlying the invention of the ammonia beam maser by Charles Townes and his collaborators at Columbia University in the early 1950s, emphasizing particularly that the merits of the device as ‘atomic clock’ were not anticipated, and that until it actually worked the maser was not a priority project in Townes laboratory.
The list of selected staff publications may be searched by keyword or author and can be sorted by year.
An overview of the exhibition in the Smithsonian Institution Libraries’ Dibner Gallery in the Museum, August 1993 to May 1994. The last exhibition to be curated by Ellen Wells, it traced the history of tunneling technology, from antiquity to the present, with particular emphasis on the 19th century.
Examines deep divides at the height of the Progressive Era as expressed through holidays and holiday imagery.