huguer L.M. 1864-1919 the MEMORIAL OF LEA McI. LUQUER PAUL F. KERR, Columbia University. In 1658 Jean L'Escuyer of Paris landed in America. He settled on Long Island, and, a few years later, married. He was a respected citizen, owned and operated a mill, and held a position as elder in the Dutch Church. His great-grandson, Abraham Luquer, was the first to adhere to the present spelling of the name in Dr. Lu- quer's branch of the family. Abraham Luquer owned a farm in Brooklyn, on Gowanus Bay, and there Dr. Luquer's father, Rev. Lea Luquer, was born; and lived, until his marriage, in 1860. The Reverend Lea Luquer graduated from Columbia College in 1852. He then studied law with the well- known firm of Kent and Eaton, was admitted to the bar, and practised for several years before he decided to enter the ministry. He was or- dained in 1863, and took charge of the organization of the Church of the Atonement, in Brooklyn. It Lea Mellvaine Luquer was in Brooklyn that Dr. Luquer 1864-1930 was born, September 4, 1864. In 1866 the Reverend Lea Luquer's health caused him to give up his city parish and accept a call to St. Matthew's Church, Bedford, New York, in which charge he continued until his death in 1919. Dr. Luquer received his early education from his father. In 1879 he was sent to Trinity Military Institute, at Tivoli-on-the- Hudson, where he prepared for college. He made a splendid record at the school, and when he graduated received a special prize for outstanding excellence in all of his work. In 1885 he entered the School of Mines, Columbia University, where he made an enviable record and from which he graduated in 1887, with the degree of civil engineer. In 1896 he married Anne Low Pierrepont, daughter of Henry E. Pierrepont, of Brooklyn. His first experience in teaching was in 1887, under Professor Munroe, as an assistant in surveying, at the Summer School near Litchfield, Connecticut. This postponed his attempts to look for 97 98 THE AMERICAN MINERALOGIST work, and when college opened in September he was in search of employment. He chanced to hear of a fellowship available in mineralogy, through Professor Moses, then a tutor in the depart- ment. After interviewing Professor Egleston he received the fel- lowship, and remained in mineralogical work throughout the re- mainder of his life. Dr. Luquer was one of the early workers in optical mineralogy, in America. His thesis work at the School of Mines, from which he was granted the doctorate in 1894, was along the lines of optical mineralogy. In 1898 he published the first edition of his book Minerals in Rock Sections. The book has been one of the most successful in its field, being used not only in this country; but in many other parts of the English-speaking world. Dr. Luquer traveled extensively in Europe, gaining much of his experience in optical mineralogy from European study. In addition to his book on minerals in thin sections, he published numerous technical articles on various phases of mineralogy. Not only was Dr. Luquer interested in the progress of mineralogy as a science, but he was even more devoted to his work with students. Few men have had such poise, and the ability to meet all situa- tions, with apparent ease. In addition to his university work Dr. Luquer was always en- gaged in outside activities. For many years he was active in the support of the New York Kindergarten Association. He also be- longed to the City club of New York, and to the Century associa- tion. In the field of mineralogy, aside from his professorship at Co- lumbia, he was from 1926 until his death, research associate in the department of mineralogy of the American Museum of Natural History. He was a fellow of the New York Academy of Science, and of the Mineralogical Society of America; and a member of the American Association for the Advancement of Science. Dr. Luquer suffered a heart attack in the spring of 1924. He was granted a year's sick leave, and retired from Columbia in 1925. He went to Europe in an attempt to regain his health. After a few years of retirement, when he had apparently regained much of his former vigor, he died suddenly January 30, 1930. Beside Mrs. Luquer he is survived by four children, Lea Shippen Luquer, Thatcher Payne Luquer, Evelyn Pierrepont Luquer, and Ellen Pierrepont Luquer, now Mrs. Thomas L. Purdy. JOURNAL MINERALOGICAL SOCIETY OF AMERICA 99 BIBLIOGRAPHY Luquer, L. M., Methods of modern petrography. Sch. Mines Quarterly, 13, 357-64, 1892. Luquer, L. M., and Moses, A. J., Alabandite from Tombstone, Ariz. Wavellite from Florida. Sch. Mines Quarterly, 13, 236-9, 1892. Luquer, L. M., Mineralogical notes. Sch. Mines Quarterly, 14, 327-9, 1893. Luquer, L. M., The optical recognition and economic importance of the common minerals found in building stones. Sch. Mines Quarterly, 15, 285-336, 1894, Luquer, L. M., and Moses, A.J., Index to mineralogical literature. Sch. Mines Quar- terly, 15, 163-79, 1894. Luquer, L. M. and Volckening, G. J., On three new analyses of sodalite, from three new localities. Am. Jour. Sci., (3) 49, 465-6, 1895. Luquer, L. M. and Ries, H., The "augen" gneiss area, pegmatite veins, and diorite dikes at Bedford, New York. Am. Geol., 18, 239-61, 1896. Luquer, L. M., The minerals of the pegmatite veins at Bedford, New York. Am. Geol., 18, 259-61, 1896. Luquer, L. M., Optical mineralogy. Sch. Mines Quarterly, 17, 435-69, 1896. Luquer, L. M., Optical scheme. Sch. Mines Quarterly, 19, 93-6, 1897. Luquer, L. M., Minerals in rock sections. 1898; 2nd edition, 1905; 3rd edition, 1908; 4th edition, 1913. Luquer, L. M., On the determination of relative refractive indices of minerals in rock sections by the Becke method. Sch. Mines Quarterly, 23, 127-33, 1902. Abst. Science, (ns) 15, 867. Luquer, L. M., Ramosite not a mineral. Am. J. Sci., (4) 17, 93-4, 1904. Luquer, L. M., Bedford Cyrtolite. Am. Geol., 33, 17-19, 1904. Luquer, L. M., Fusion table of minerals in the oxy-gas blowpipe flame. Sch. Mines Quarterly, 29, 179-182, 1908.