Please login in order to download photos in full size
Please note to download premium images you also need to join as a free member..
You can also save the photos without the registration - but only in small and average sizes, and some of them will have the site's watermark. Please simply click your right mouse button and save the image.
Please login in order to like photos
If you are not registered, please register for free:
Sorry, non-members can download up to 100 full-size photos per month.
It looks like you have used up your limit.
Join as a member today for FREE! - and download the images without limitations:
You can also save the images without the membership - but only in small and average sizes, and some of them may have the site's watermark. Please simply click your right mouse button and save the image.
English: A Shortt-Synchronome free pendulum clock belonging to the US National Institute of Standards and Technology (NIST), in the NIST Museum, Gaithersburg, Maryland, USA. Invented in 1921 by William Hamilton Shortt, it was the most accurate mechanical clock ever manufactured, achieving an accuracy of around one second per year. This example was purchased by NIST in 1929 and used by physicist Paul R. Heyl in his second determination of the gravitational constant. Alterations to image: brightened slightly, changed from GIF to JPEG.
|Source||Downloaded 2009-12-29 from Highlights of the NIST Museum, NIST Virtual Museum, US National Institute of Standards and Technology website. No source information or copyright notice was given.|
(Reusing this file)
Public domain because it is work of the US National Institute of Standards and Technology. Copyright notice on the website:
|This image is in the public domain because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.|
All photos in average size can be saved by everyone without registration (by right-clicking) - and all photos can be downloaded in full-size and without the big watermark by members (by left-clicking) (registration and free membership required).
While the copyright and licensing information supplied for each photo is believed to be accurate, Free-Photos.biz does not provide any warranty regarding the copyright status or correctness of licensing terms. If you decide to reuse the images from Free-Photos.biz, you should verify the copyright status of each image just as you would when obtaining images from other sources.
The use of depictions of living or deceased persons may be restricted in some jurisdictions by laws regarding personality rights. Such images are exhibited at Free-Photos.biz as works of art that serve higher artistic interests.