Letter from Albert Einstein to the United States Navy’s Bureau of Ordnance describing the forces experienced by a torpedo’s firing pin mechanism upon impact with a solid object, 4 Jan 1944, page 1 of 2.

Caption     Letter from Albert Einstein to the United States Navy’s Bureau of Ordnance describing the forces experienced by a torpedo’s firing pin mechanism upon impact with a solid object, 4 Jan 1944, page 1 of 2. ww2dbase
Photographer    Unknown
Source    ww2dbaseUnited States National Archives
Identification Code   hd1-98991445-2012-001-pr
More on...   
Albert Einstein   Main article  Photos  
Mark XIV   Main article  Photos  
Photo Size 2,112 x 2,786 pixels
Photos in Series See all 2 photos in this series
Photos on Same Day 4 Jan 1944
Added By David Stubblebine
Licensing  Public Domain. According to the US National Archives, as of 21 Jul 2010:
The vast majority of the digital images in the Archival Research Catalog (ARC) are in the public domain. Therefore, no written permission is required to use them. We would appreciate your crediting the National Archives and Records Administration as the original source. For the few images that remain copyrighted, please read the instructions noted in the "Access Restrictions" field of each ARC record.... In general, all government records are in the public domain and may be freely used.... Additionally, according to the United States copyright law (United States Code, Title 17, Chapter 1, Section 105), in part, "[c]opyright protection under this title is not available for any work of the United States Government".

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