You can even become part of a worldwide network of haze observers by submitting observations via the Internet. Visit the TERC site for detailed instructions. Mass. TERC has set up a haze monitoring site on the World Wide Web. For more information about this project, check out the Society for Amateur Scientists's World Wide Web site . I gratefully acknowledge informative conversations with Forrest Mims.
Angle brackets align the case to the sun.
They can also be used with the level to calculate the sun angle.