English: Reference: DS.GP.1919/3428

This photograph shows a Paraboloid test using equipment made by Grubb Parsons in the early 20th Century.
This photograph is taken from the Grubb Parsons Ltd collection at Tyne & Wear Archives. The records of Grubb Parsons Ltd, Newcastle upon Tyne, England, consist of 65 linear metres (213 linear feet) of files, plans, photographs and glass plate negatives relating to this internationally renowned firm's manufacture of precision telescopic instruments.
The original Business was founded in the early nineteenth century by Thomas Grubb, in 1925 the company was acquired by Sir Charles Parsons and continued to manufacture Telescopic and Astronomical instruments until 1985.
This Glass Lantern Slide is taken from a large collection that documents the work of Grubb Parsons Ltd at their workshop in Walkergate, Newcastle upon Tyne. It was here that Grubb Parsons Ltd manufactured Telescopic and Astronomical equipment for companies and observatories world wide. Their equipment was designed and built for use and research across the Globe, to name only a few of these locations Grubb Parsons Ltd supplied to the UK, Switzerland, Denmark, Egypt, South Africa, Greece, Australia, Japan, India, Hawaii, Poland, Chile, Canada, France and Spain.

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