By clicking on this picture, you could make it interactive. You should have Excel installed on your computer;
its security level should be set to Medium (form the main Excel menu, go to Tools/ Macro/ Security...).
You also should allow macros when prompted. Netscape and older versions of IE would not open the interactive
picture here, but you still will be able to download and save on your computer the file
theta_in_tyr_for_web.xls which could be then open by Excel. Please note that opening the interactive
picture can take a little while (280 KB).