According to his calculation, in 151 authors included in both editions, there are 49 English or American authors, 27 Frenchmen, 20 Germans, 15 ancient Greeks, 9 ancient Romans, 4 Russians, 4 Scandinavians, 3 Spaniards, 3 Italians, 3 Irishmen, 3 Scots, and 3 Eastern Europeans. Prejudices and preferences, he concludes, are self-evident. In response, such criticisms have been derided as ad hominem and biased in themselves. The counter-argument maintains that such criticisms discount the importance of books solely because of generic, imprecise and possibly irrelevant characteristics of the books' authors, rather than because of the content of the books themselves. Works Others thought that while the selected authors were worthy, too much emphasis was placed on the complete works of a single author rather than a wider selection of authors and representative works (for instance, all of Shakespeare's plays are included). The second edition of the set already contained 130 authors and 517 individual works. The editors point out that the guides to additional reading for each topic in the Syntopicon refer the interested reader to many more authors. Difficulty The scientific and mathematical selections came under criticism for being incomprehensible to the average reader, especially with the absence of any sort of critical apparatus. The second edition did drop two scientific works, by Apollonius and Fourier, in part because of their perceived difficulty for the average reader. Nevertheless, the editors steadfastly maintain that average readers are capable of understanding far more than the critics deem possible. Robert Hutchins stated this view in the introduction to the first edition: Because the great bulk of mankind have never had the chance to get a liberal education, it cannot be "proved" that they can get it. Neither can it be "proved" that they cannot. The statement of the ideal, however, is of value in indicating the direction that education should take. Rationale Since the great majority of the works were still in print, one critic noted that the company could have saved two million dollars and simply written a list. Dense formatting also did not help readability. Nonetheless, Encyclopædia Britannica's aggressive promotion produced solid sales. The second edition selected translations that were generally considered an improvement, though the cramped typography remained. Through reading plans and the Syntopicon, the editors attempted to guide readers through the set. Response to criticisms The editors responded that the set contains wide-ranging debates representing many viewpoints on significant