J. Kemeny. Man Viewed as a Machine. Scientific American, Vol. 192, No. 4, 1955.
This is a wonderful article about the advent of the "Turing Machine" concept in the 1950s.
It is yet another example in which logical and physical machines are conflated (from today's perspective):
"Turing's machines may be clumsy and slow, ..." [p.60]
"... this slows the universal machine down considerably." [p.61]
A pure mathematician today would presumably insist that each operation of a logical machine takes no time at all; see e.g. Paul Henry's Mathematical Machines in the book entitled: The Machine as Metaphor and Tool, edited by Haken et al., Springer-Verlag 1993.
[Last updated: 31 August 2020]