From PeselyG@apsu.edu Sat Nov 10 13:43:49 2001 Received: from mailscan2.cac.washington.edu (mailscan2.cac.washington.edu [140.142.33.16]) by lists.u.washington.edu (8.11.6+UW01.08/8.11.6+UW01.10) with SMTP id fAALhmn65952 for ; Sat, 10 Nov 2001 13:43:49 -0800 Received: FROM mxu3.u.washington.edu BY mailscan2.cac.washington.edu ; Sat Nov 10 13:43:45 2001 -0800 Received: from exchange.apsu.edu (exchange.apsu.edu [198.146.56.24]) by mxu3.u.washington.edu (8.11.6+UW01.08/8.11.6+UW01.10) with ESMTP id fAALhi221042 for ; Sat, 10 Nov 2001 13:43:45 -0800 Received: by EXCHANGE with Internet Mail Service (5.5.2653.19) id ; Sat, 10 Nov 2001 15:37:03 -0600 Message-ID: <8C1D549B4324D51181010090277A49DE1638DE@EXCHANGE> From: "Pesely, George" To: "'classics@u.washington.edu'" Subject: RE: water clocks Date: Sat, 10 Nov 2001 15:37:03 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C16A2F.D66A9180" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C16A2F.D66A9180 Content-Type: text/plain; charset="iso-8859-1" There is a 5th-century terra cotta water clock (klepsydra) in the Agora Museum (Stoa of Attalos) in Athens, and a description of how they were used in court in Aristotle, Constitution of Athens 67.2. According to the articles by G. J. Toomer, "clocks" and "Ctesibius" in the 3rd ed. of the Oxford Classical Dictionary, accuracy was not achieved until the 3rd century, by Ctesibius--his water-clock is described by Vitruvius (9.8). He cites A. G. Drachmann, Ktesibios, Philon and Heron (1948) 16-41 Other references: the article on "clocks" in the 2nd ed. of the OCD, by H. J. Rose, and the article "Wasseruhren" by Ju+rgen Mau in Der Kleine Pauly, vol. 5, and his article "Ktesibios" in KP, vol. 3 (with diagram). Mau cites A. G. Drachmann, The Mechanical Technology of Greek and Roman Antiquity (Copehagen, 1963). George Pesely, Austin Peay State University, Clarksville, TN peselyg@apsu.edu www.apsu.edu/~peselyg -----Original Message----- From: Rick Duggin [mailto:rduggin@juno.com] Sent: Saturday, November 10, 2001 3:10 PM To: CLASSICS@u.washington.edu Subject: water clocks Vegetius, in his De Re Militari, iii.8, speaks of military guards dividing their watch into three hour segments by means of the water clock. Are there other references to the water clock, and does anyone know how it worked? Thanks. Rick Duggin Murfreesboro, TN ------_=_NextPart_001_01C16A2F.D66A9180 Content-Type: text/html; charset="iso-8859-1"
There is a 5th-century terra cotta water clock (klepsydra) in the Agora Museum (Stoa of Attalos)
in Athens, and a description of how they were used in court in Aristotle, Constitution of Athens 67.2.
 
According to the articles by G. J. Toomer, "clocks" and "Ctesibius" in the 3rd ed. of the Oxford Classical Dictionary, accuracy was not achieved until the 3rd century, by Ctesibius--his water-clock is described by Vitruvius (9.8).
 
He cites A. G. Drachmann, Ktesibios, Philon and Heron (1948) 16-41
 
Other references: the article on "clocks" in the 2nd ed. of the OCD, by H. J. Rose, and the article "Wasseruhren" by Ju+rgen Mau in Der Kleine Pauly, vol. 5, and his article "Ktesibios" in KP, vol. 3 (with diagram).
 
Mau cites A. G. Drachmann, The Mechanical Technology of Greek and Roman Antiquity (Copehagen, 1963).
 
George Pesely, Austin Peay State University, Clarksville, TN
peselyg@apsu.edu               www.apsu.edu/~peselyg
-----Original Message-----
From: Rick Duggin [mailto:rduggin@juno.com]
Sent: Saturday, November 10, 2001 3:10 PM
To: CLASSICS@u.washington.edu
Subject: water clocks

Vegetius, in his De Re Militari, iii.8, speaks of military guards
dividing their watch into three hour segments by means of the
water clock.
 
Are there other references to the water clock, and does
anyone know how it worked?
 
Thanks.
 
Rick Duggin
Murfreesboro, TN 
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