No abstract

Accordingto the recent survey by L Fischer {28) of the literature of analytical chemistry, the fraction of publications devoted to the use of x-ray diffraction has decreased by a factor of one third in the 10-year period between 1955 and 1965. This, of course, does not indicate any diminution in the use of such methods by analysts; it merely means that most analytical research chemists are devoting their time at the moment to other fields and, therefore, fewer new applications are being developed. On the other hand, it is our impression that the volume of literature concerned with the use of x-ray diffraction methods for molecular structure determinations is increasing steadily. This latter fact is probably partly connected with the increasing speed, power, and availability of computers.