【正文】
(and even mechanical desk calculators) to solve the Schrodinger equation numerically, and they were able to determine the bond energy of the hydrogen molecule to within 10 percent of the presently accepted experimental course, molecular structure can be determined by many experimental methods as well, for example, by Xray diffraction, molecular spectroscopy, or magneticresonance. In each of these experimental methods,the availability of puterbased methods of analyzing data has made possible the determination of structures for more plex than could have been done 20 years ago. For example, the plete threedimensional structures of biologically significant molecules such as myoglobin, an oxygencarrying protein that is similar to hemoglobin and contain more than one hundred atoms, has been pletely worked out usingXray diffraction and puter reduction of data