Productivity in terms of scientific publication was described by Lotka in 1926. He discovered that in the hard sciences he a u l d predict the number of papers an author would write providing he knew how many authors wrote only one paper during a given time period. The factor for predicting the number of papers in a field like chemistry was found to be l / n 2 of the number of authors writing only one paper. That is, if 100 authors wrots one paper, only 25 would write two papers, and only 11 would write three papers, etc. I f the Lotka constant holds for the hard sciences it was hypothesized (and tested) that other disciplines would have other constants. and thereby form a continuum based on productivity from the hard sciences to the non-sciences. The titaratwe of information science has been examined between 1966 and 1970. U t was determined that a new constant, l / n 3 -' fitted information science best.