Tempus In Nummis-Volume One Author:James D. Sweeny, Dr. Robert Turfboer, M.D. Volume One of Tempus In Nummis (TIN) - The History and Fundamentals of Dating in Numismatics. Chapter I - Numerals and Numbers - Alphabetic Numbers, Psuedo-Alphabetic Numerals, Symbolic Numerals, Summary. Chapter II - Calendars - The Solar Calendars, The Lunar Calendars, The Lunisolar Calendars. Chapter III - Eras, Dates, & Dating - Uninte... more »ntional dates, Indirect Dates, Direct or Eral Dates, Why Coins are Dated.? Chapter IV - The Art of the Chronogram - The Chronograms Defined, Chronograms Criteria, The History of Chronograms, On the Character of Chronograms, The Chronogram in Numismatics, Why Chronograms?« less