Reading the rings
Methuselah tree
a Windfall Films production for NOVA/WGBH and Channel 4 ; produced by Ian Duncan and Nicole Davis ; directed by Ian Duncan.
[S. Burlington, Vt.?] : WGBH Boston Video, 2001.
  1. VHS.
  2. Not rated.
  3. Closed-captioned.
  4. Videocassette release of an episode of the television program Nova.
  5. "Travel to a top-secret location high in the White Mountains of California and explore our stunning past through the life of a 26-foot bristlecone pine that quietly holds the title of 'Oldest living thing on earth,' and is known as the Methuselah Tree"--Container.
Green careers for dummies
Carol McClelland.
Hoboken, N.J. : Chichester : John Wiley [distributor], 2010.
McClelland, who runs an online career center, also has hands-on knowledge of the world of sustainability. In this useful volume, she offers practical tips on what jobs are out there, what skills they require, and how to go about landing one. Laid out in the 'dummies' style, with lots of bulleted lists and pointers, the guide teaches the reader what the green economy is, defining terms and naming key events and resources. She continues to develop these topics and also offers advice on how the reader can continue to learn more and why they should. Typical of the series, this volume is filled with accurate, accessible information and, in this case, very sensible, detailed, and basic job-seeking advice. Annotation ©2010 Book News, Inc., Portland, OR (
Green careers : choosing work for a sustainable future
Jim Cassio & Alice Rush.
Gabriola Island, B.C. : New Society Publishers, c2009.
People of all Ages and Backgrounds are seeking work in career fields that will help save the planet, yet many people are unaware of the variety of green careers available. This unique career guidance book, based on labor market research, covers green jobs representing almost every area of career interest.

A tree ring represents one year in the life of a tree 

Telling time with trees. Yes, it is true. Dendrochronology (dentro=trees, chrono=time, and ology=study of) is the science of dating past events by analyzing the width of the rings in tree trunks. Scientists, called dendrochronologists, read these patterns to study environmental changes and consider their impact on man.

The principles of dendrochronology are applied in many areas research because tree rings provide evidence of floods, droughts, insect infestation, fires, and earthquakes. By learning about droughts from past centuries, dendrochologists are able to help scientists in other fields seek solutions for current droughts.  Dendrochologists also work with historians to date the time that buildings were constructed.  Other research efforts include using tree rings to help tract large-scale climate variability, date prehistoric wildfires, and confirm glacier movements.

Dating Missouri's buildings

The Missouri Tree-Ring Laboratory has dated over 40 historic structures in Missouri, Illinois, and Ontario including the DeLasuss House in St. Genevieve, Missouri.

(See how it's done)

A dendrochronologist working with a climatologist dated violins, also offering a theory for the “secret” ingredient of a Stradivarius violin’s sound. According to these two scientists, the wood used for the Stradivarius violin’s sound developed special acoustic properties as it was growing. They suggest a “Little Ice Age,” gripped Europe from the mid-1400’s until the mid-1800’s slowed down tree growth and yielded uncommonly dense alpine spruce for Antonio Stradivarius and other famous 17th century Italian violinmakers.

Andrew Ellicott Douglass began this field of study in the early 1900s at the University of Arizona. Laboratories around the world, in association with universities, continue research in the field today. The latest developments in dendrochronology are aided by the growth of computer and image analysis.

Article by: St. Louis Public Library staff