Units. A. B. Γ. Δ. E. ς. Ζ. H. Θ. 1. 2. 3. 4. 5. 6. 7. 8. 9. Tens. I. Κ. Λ. Μ. Ν. Ξ. Ο. Π. κοππα 10. 20. 30. 40. 50. 60. 70. 80. 90. Hundreds. P. Σ. Τ. Υ. Φ. Χ. Ψ. Ω. σαμπι 100. 200. 300. 400. 500. 600. 700. 800. 900. They are sometimes preceded by the word ΕΤΟΥΣ, thus, ΕΤΟΥΣ ΡΚΔ = _Anno_ 124. On the coinage of Egypt, both under the Ptolemies and under the Roman Emperors, the character [L] is used instead of the word ΕΤΟΥΣ, thus, ΛΓ = _Anno_ 33. This character was probably an ancient Egyptian symbol meaning _year_, adopted into the Greek system of numeration for the sake of brevity. The following are a few of the many epochs or _æras_ according to which coins are dated:-- The Seleucid æra begins B.C. 312. The Pompeian " B.C. 63. The Cæsarian " B.C. 48 or 47. The Augustan or Actian æra begins B.C. 31. § OF THE DENOMINATIONS OF GREEK COINS. The unit of account in Greece was the _drachm_. The weight of the drachm was not everywhere identical. It ranged, as a rule, between about 55 and 95 grs. troy. For purposes of calculation it may be taken in a general way as the ancient equivalent of our modern shilling or franc. Of the various standards of weight which prevailed in different parts of the Greek world, the _Attic standard_ was the most widely diffused. The weights of the various denominations, according to this standard, are as follows:-- The Talent = 405,000 grs. troy } not { = 6,000 drachms. " Mina (1/60 of the Talent } coined { = 6,750 grs. troy) } { = 100 drachms. " Tetradrachm = 270 grs. troy = 4 drachms. " Didrachm = 135 " " = 2 " " Drachm = 67·5 " " = 1 " " Tetrobol = 45 " " = 4 obols. " Triobol = 33·75 " " = 1/2 drachm or 3 obols. " Diobol = 22·5 " " = 2 obols. " Trihemiobol = 16·8 " " = 1-1/2 obols. " Obol = 11·25 " " = 1 obol. " Hemiobol = 5·62 " " = 1/2 " " Tetartemorion = 2·81 " " = 1/4 " The other standards are the _Æginetic_ (drachm 97 grs.); the _Phœnician_ (drachm 56 grs.); the _Rhodian_ (drachm 60 grs.); the _Persian_ (drachm 88 grs.). The other denominations of the above standards may be easily got at by multiplying or dividing the drachms as in the Attic standard. Larger denominations than the tetradrachm are rare, but octadrachms, decadrachms, etc., etc., occur at some towns. The unit in copper was called the _chalkous_; but its weight does not appear to have been definitely fixed like that of the silver drachm.