Thanks Brett and Dave for causing some fond memories to live again fresh in=
 my thinking.
    Lest anyone believe the analog computer based in op amps was just an ol=
d technology of marginal importance, consider the following.  One of the mo=
st significant physiology texts of all time was the (world-famous-to-med-st=
udents) book written years ago by Arthur C. Guyton (see http://en.wikipedia=
..org/wiki/Arthur_Guyton).  New editions will no doubt continue to be publis=
hed for a long time to come, by some outstanding one of the students that h=
e mentored.  I taught physics to one of his several sons at Ole Miss, who w=
ent on themselves to become physicians, now spanning three generations of d=
octors.  ( Robert A. Guyton is Chief of Cardiothoracic Surgery at Emory Uni=
versity here in Georgia).   Guyton's connection to Oxford prompted me to vi=
sit his laboratory at the University of Mississippi Medical Center in Jacks=
on .  There I saw his analog computer simulation of the cardio-vascular sys=
tem (large number of discrete transistor amplifiers mounted in relay racks)=
 that played a major role in changing the course of medical science history=
.
    Randall
Thanks Brett and=
 Dave for causing some fond memories to live again fresh in my thinking.
    Lest anyone believe the=
 analog computer based in op amps was just an old technology of marginal im=
portance, consider the following.  One of the most significant physiol=
ogy texts of all time was the (world-famous-to-med-students) book written y=
ears ago by Arthur C. Guyton (see http://en.wikipedia.org/wiki/Arthur_Guyto=
n).  New editions will no doubt continue to be published for a long ti=
me to come, by some outstanding one of the students that he mentored.  =
;I taught physics to one of his several sons at Ole Miss, who went on thems=
elves to become physicians, now spanning three generations of doctors. =
; ( Robert A. Guyton is Chief of Cardiothoracic Surgery at Emory University=
 here in Georgia).   Guyton’s connection to Oxford prompted=
 me to visit his laboratory at the University of Mississippi Medical Center=
 in Jackson .  There I saw his analog computer simulation of the cardi=
o-vascular system (large number of discrete transistor amplifiers mounted i=
n relay racks) that played a major role in changing the course of medical s=
cience history.
    Randa=
ll
=