This is the second of a 5 part series of papers examining several local and non-local factors which affect dowsing measurements on a daily, monthly, annual, or ad hoc basis. Via the use of a standard yardstick, this paper quantifies significant variations in its length during the course of a day. In general, perceived measurements gradually increase in length during daylight hours, and continually reduce during the night. The major turning points are the local times of sunrise and sunset. To a lesser extent tides have an influence, but other perturbations are present that require further research. As well as tides and the Sun's photons, several additional contributory factors are identified such as the Earth's spin on its tilted axis, gravity, solar wind, or a possible subtle energy emitted by the Sun. But is the repeatable daily pattern of changing length caused by biological effects in the dowser, or in the information obtained by the dowser? In other words, is the above list of physical local and non local factors acting directly on the dowser's brain and body, or are these factors causing changes in consciousness via the Information Field? The latter is the "front runner" in the theory of dowsing.