It required a pan of water and a means of generating two separate waves, each emanating from a slit in a partition in a tray of water. A linear wave was generated behind the partition and two waves of water emerged through the slits as the wave continued as two waves fanning out in concentric circular patterns.
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Telephone (new number): 01296 318540ï»¿ Fax: 020 7518 1058ï»¿. Opening times - 9am to 5pm, Monday-Friday, excluding Bank holidays. The call centre, for general registrations and Petlog enquiries will remain open but there will be no phone service available at the London office on Friday 2nd October until Monday 5th October.he call centre, for general registrations and Petlog enquiries will remain open but there will be no phone service available at the London office on Friday 2nd October until Monday 5th October.