Excerpt from Organic Chemistry, Vol. 2
The present volume (Part II.) consists principally of a description of the aromatic compounds, and, together with Part I., forms an introduction to Organic Chemistry.
The opening chapters of Part II. contain an account of coal-tar and its treatment. This leads naturally to a description of the preparation and properties of benzene, and to a discussion of its constitution in the light of facts previously dealt with; tho student is thus made acquainted with the principal characteristics of aromatic, as distinct from fatty, compounds, and is then in a position to understand the classifications of organic substances into these two main divisions.
The more important classes of aromatic compounds are then described, but in a somewhat different manner from that adopted in Part I., inasmuch as a general account of the properties of each class of substances is given before, instead of after, the more detailed description of typical compounds; this course is to a great extent free from the disadvantages which are found to attend its adoption at earlier stages, as the student has by this time acquired some experience of the more systematic method from a study of the summaries given in Part I.
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