Antique dating with science
The new method does not involve removing a sample of the object.
Conventional carbon dating estimates the age of an artifact based on its content of carbon-14 (C-14), a naturally occurring, radioactive form of carbon.
Comparing the C-14 levels in the object to levels of C-14 expected in the atmosphere for a particular historic period allows scientists to estimate the age of an artifact.
Both the conventional and new carbon dating methods can determine the age of objects as far back as 45,000 to 50,000 years, Rowe said.
Reporting at the 239th National Meeting of the American Chemical Society (ACS), they said it could allow scientific analysis of hundreds of artifacts that until now were off limits because museums and private collectors did not want the objects damaged.
"This technique stands to revolutionize radiocarbon dating," said Marvin Rowe, Ph. "It expands the possibility for analyzing extensive museum collections that have previously been off limits because of their rarity or intrinsic value and the destructive nature of the current method of radiocarbon dating.
He further refined the instrument with the incorporation of a rack and pinion coarse focus and fine focus enabled by a graduated wheel.
Proud of their craftsmanship, microscope makers routinely inscribed their name and model number on instruments –making identification of the exact make and model of an antique microscope is easier than most other antiques.
A Bausch & Lomb 1898 Model BB recently sold for just over ,000 and other models sell as high as ,000.
Books document the evolution of our need to make sense of the world around us.
This urge can be seen in the first Gutenberg bible of 1455; the ‘First Folio’ of plays by William Shakespeare, published in 1623; John James Audubon’s monumental “Birds of America,” which was printed between 18; and even the pocket-size...
Considered the finest optical instruments of the time, different magnifications were obtained by inserting eyepieces of varying lens strength into the monocular head in combination with different objectives.