Association on the part of Cutbush with the men of science in Philadelphia during the first decade of the Nineteenth Century led to an extension of his interest in science circles, so that during leisure moments at West Point (1824) he wrote of the following minerals observed by him in and near that place: "Molybdenite, kaolin, tremolite, schorl, adularia, garnet, actinolite, precious serpentine (remarkably elegant), epidote and diallage." Recently, attention has been called to a volume by Cutbush entitled "Lectures on the Adulteration of Food and Culinary Poisons.... With a Means of Discovering Them and Rules for Determining the Purity of Substances." It was published at Newburgh, N. Y., in 1823. The writer has never seen this volume. His search for it has been unsuccessful. Another publication was "A Synopsis of Chemistry, Arranged Alphabetically, Comprehending the Names, Synonyms, and Definitions in that Science." New York: E. Lewis, 1821. This book is also exceedingly rare. The real magnum opus of Cutbush resulted in "A System of Pyrotechny" (1825), which voluminous publication did not appear until after his decease, and then largely through the efforts of his wife and former students in the Cadet Corps, for, in _Silliman's Journal_, this note appeared: "Mrs. Cutbush, widow of the late Dr. Cutbush, of West Point, proposes to publish by subscription a Treatise on Pyrotechny by her husband, Dr. James Cutbush.... By the reputation which Dr. Cutbush sustained, as well as by the ability which his elaborate treatises on these subjects already published in this journal display, there can be no doubt that this posthumous work will be worthy of the public patronage, which we hope will be liberally bestowed." Even to-day this publication stands out preeminently and for years has been referred to by artisans and by scientists. Chapters dealing with military fireworks have been seriously studied. In the light of the violent fires, grenades, etc., used in the late war the writings of Cutbush become very fascinating. They show that he truly blazed the way in this field. In the introduction to this splendid volume he wrote: