A somewhat different arrangement of heliostats in a field is used at experimental solar furnaces, such as the one at Odeillo, in France.
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Heliograph, a similar non-tracking device, used for communication
One of Yellott's clients was Northrup, Inc. whose founder Leonard L. Northrup Jr. was introduced to solar technology by Yellott, and whose company went on to develop some of the first solar air conditioning systems and heliostats, under Yellott's on-going advice.
Constructed by a team from Australian National University, the station consisted of fourteen three-metre parabolic dishes, each covered by more than 2000 mirrors and mounted on a heliostatic mounting.