Treatise on Chemistry. Vol. III., Part IV. By Professors Roscoe
and Schorlemmer. (Macmillan and Co.)—Part III., which appeared in 1886, began the study of the aromatic hydrocarbons, with the constitution of benzene and benzene derivatives. In Part IV. we reach the aromatic bodies containing seven atoms of carbon, beginning with tolmen ; afterwards we work through the benzyl, benzoyl, and hydro-benzyl groups, and conclude with the xyline group of eight carbon compounds. The authors have striven to make Part IV. as complete as the preceding division. It may emphatically be called encyclopEedic, if such a term can be used of any chemical treatise, even when it is confined to seven and eight carbon compounds. We congratulate Professors Roscoe and Schorlemmer on their latest addition to the chemistry of aromatic substances.
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