The following treatises, in contrast to grammar, which teaches the connections of thoughts, initially focus on the study of vocabulary and within it, the independent content of thoughts in languages. The investigation is based on the evidence that the meaning of words in each language is peculiar and reflects the entire worldview of a people through conceptual series. By comparing such conceptual series in different languages, both the uniqueness of the compared idioms and the essence of the compared ideas are explored. This is followed by an attempt to classify grammatical phenomena according to their meaning within the conceptual series that express the same meaning in independent words.

The Publishing House of Sciences publishes historical literature by both well-known and unknown scientific authors. This makes works that have long been out of print accessible again to interested readers. These linguistic treatises are an unaltered, high-quality reprint of the original edition from 1885.