The resistance thermometer used for measuring the temperature of the
body of the man is of a somewhat different type, since it is necessary
to wind the coil in a compact form, inclose it in a pure silver tube,
and connect it with suitable rubber-covered connections, so that it can
be inserted deep in the rectum. The apparatus has been described in a
number of publications.[9] The resistance of this system is also not far
from 20 ohms, thus simplifying the use of the apparatus already
installed on the observer's table.