``THE MESSIAH" UNDER GOES RIGOROUS ANALYSIS     

KNOXVILLE, Tenn. (AP) - Dr. Henri Grissino-Mayer's expertise is trees, not 
musical instruments. 

But the University of Tennessee professor and his colleagues may have helped 
prove the authenticity of one of the most celebrated instruments in the world 
- the rarest Stradivarius violin in existence. 

Never used in a performance, not played in a century, this instrument 
reputedly kept by Italian craftsman Antonio Stradivari until his death in 
1737 has become known as ``The Messiah.'' 

Housed in the Ashmolean Museum in Oxford, England, the violin is said to be 
worth $15 million to $20 million. That is, unless it's a copy made after 
Stradivari's death, which is what Stewart Pollens, conservator of musical 
instruments at the Metropolitan Museum of Art in New York, alleged in a 1998 
report that shook the insular world of art and collecting. 

The Violin Society of America turned to Grissino-Mayer, a noted 
dendrochronologist (someone who does tree-ring dating), for help. 
``Essentially, if it has got wood and it has enough rings, then we can date 
it, regardless of what it is,'' Grissino-Mayer explained. 

``When the controversy continued, we asked him to undertake an objective 
study of the Messiah's wood,'' said Dr. Helen Hayes, president of the 
society. 

Grissino-Mayer and colleagues Malcolm Cleaveland of the University of Arizona 
and Paul Sheppard of the University of Arkansas announced their findings last 
month at the society's annual convention in Carlisle, Pa. 

They dated the Norway spruce on the instrument's top to between 1577 and 
1687, possibly from a tree a century and a half old. That timeframe would be 
consistent both with Stradivari's life (1644-1737) and the instrument's 
attributed date of manufacture in 1716. 

That finding, the society said, at least ``settled one aspect of an 
international controversy on the authenticity of the Messiah.'' 

While Pollens' questions about details in the instrument's design remain, 
Grissino-Mayer said he has no doubts about its wood. 

Grissino-Mayer, Cleaveland and Sheppard traveled to England in July and were 
given rare access to the Messiah and two other Stradivariuses. They examined 
them under a microscope for nearly eight hours. 

``They took it out of the case, took the strings off, took the bridge off and 
pretty much stripped it down to just the violin itself and then handed it to 
me,'' Grissino-Mayer said. 

``I was sitting there thinking - I get excited holding a $100 bill, much less 
a $20 million violin. Of course, I wore gloves.'' 

Such close examination revealed ``all sorts of things that had never been 
seen before,'' he said, including hidden pencil marks suggesting the 
instrument was a model that was measured for copying, rather than a copy 
itself. 

The scientists counted 109 rings in the violin's wood, he said, noting that 
one of the measures of a quality violin is ``how straight their grain is, the 
thickness of the rings and the density of the wood.'' 

While Grissino-Mayer can't say for sure the violin is a Stradivarius, he was 
impressed. ``It is as pristine as if it had just been made by Stradivari,'' 
he said.