WILLIAM S. STEEL was born in the City of Philadelphia, on the 1st of March, 1841. He received a good common school education, and in 1856 entered the office of David Cooper & Co., at Girard’s wharves, remaining engaged in mercantile pursuits till 1861. At 19 years of age he was appointed by Colonel James Ross Snowden, then Director of the United States Mint, First Assistant Weigh Clerk. In this position he served continuously through Colonel J. Ross Snowden, ex-Governor Pollock, and Colonel A. Loudon Snowden’s administrations. In September, 1862, just before the battle of Antietam, Mr. Steele entered the State service, and served with the Thirty-second Regiment, Pennsylvania Volunteers, until discharged by expiration of term. When Colonel A. Loudon Snowden was transferred to the Post Office, January, 1877, Mr. Steele, upon the recommendation of the then Coiner, Colonel O. C. Bosbyshell, became Assistant Coiner, a position he filled in a most acceptable manner, until Colonel Bosbyshell’s retirement in February, 1885, when he was made Coiner. HARRY A. CHESTER, Assistant Coiner, was born in Philadelphia (Northern Liberties), September 10, 1852, and educated in the North East School, Sixth Section. He was an attachee of the National House of Representatives from 1876 to 1882, clerk in Register of Wills’ Office from January 1, 1883, until May, 1885, when he was appointed by Colonel A. Loudon Snowden as Assistant Weigh Clerk, and promoted by Hon. Daniel M. Fox in October, 1886. DR. HENRY LEFFMANN was appointed Chief Coiner at the Philadelphia Mint January 10, 1888, by President Cleveland. Dr. Leffmann was born in Philadelphia September 9, 1847, and was educated in the public schools of Philadelphia, including four years at the Central High School. He devoted three years in practical study in the laboratory of Dr. Charles M. Cresson, and graduated at Jefferson Medical College in 1869, having been for some years assistant to the Professor of Chemistry at the College, and in 1875 was elected Lecturer on Toxicology, which position he held for a number of years. In 1876 he was elected to take charge of the laboratory of the Central High School, and remained in that position for four years. In 1883 he was elected Professor of Chemistry and Metallurgy in the Pennsylvania College of Dental Surgery, a position which he still holds; and he has been for a number of years Professor of Chemistry and Mineralogy in the Wagner Free Institute of Science. Dr. Leffmann has been engaged as chemical expert in patent and criminal cases, notably in the Goerson poisoning case and the chrome-yellow poisoning cases. He is a member of several American and foreign scientific societies, has contributed papers to current scientific literature, and has for the past five years been editor of _The Polyclinic_, a monthly medical journal. In 1880 he was a candidate for Coroner on the Democratic ticket, but was defeated, and in 1884 was appointed Port Physician for Philadelphia by