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  1. jamied says

    "The driver (who I assume is Dr. Purves)" - that is actually Dr Purves's son.

    "The driver of the one (wearing a cap and smoking a pipe) turns a handle to start the vehicle's engine. (Unclear which of the drivers is the Doctor)" - Dr Purves is the man smoking the pipe.

    The location for this demonstration was Brean Sands, near Weston-super-Mare.

  2. jamied says

    More of the Dynasphere can be seen in clip 661.13.

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