Figures & data
Figure 1 New Zealand localities mentioned in the text.
Figure 2 The top diagram is a schematic side elevation showing the layout of the horizontal photographic telescope used by the Americans at Queenstown and Whangaroa. On the right is the clock-driven heliostat that tracked the Sun and directed sunlight via a collimator to the photographic plate-holder in the prefabricated ‘Photographic House’ on the left. Extending from this building towards the heliostat is a tube, and above it a framework, designed to shield the incoming rays of the Sun from interference. The two panels below show close-ups of the photographic plate-holder (left) and the heliostat (right) (after Orchiston et al. Citation2000).
Figure 3 The Dallmeyer photoheliograph used by the British party at Burnham (courtesy: RAS Library).
