PROF. JAMES C. BOOTH, Chemist, Melter, Refiner, and Assayer, United States Mint, and Late Professor of Chemistry in Central High School, Philadelphia, and the Franklin institute, of Philadelphia.
C. W. CRESSON, M.D.
JOHN SARTAIN, ESQ. (Mezzotint Engraving), Philadelphia.
THEO. D. RAND, ESQ;
MESSRS. HINSHELLWOOD & MAIGNELLE, Of the Continental Bank Note Company New York.
JOHN FREAS, ESQ., Of the Germantown Telegraph, (Fish Culture and Angling)
The work, it is believed, will be found more reliable and thorough than any one of its class now in print. The miscellaneous department contains much valuable and interesting information. Some matters properly belonging under other heads, but received too late, have been transferred to it. The reader is especially requested to refer to the index when seeking information.