BGI Gallery of Historic Images and Reference Materials

Last updated: May 8, 2008

The photos reproduced in this section are from our collection which may be of interest to persons working in the field of Aerosol Science, Air Pollution or Industrial Hygiene.

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Title Page	Diagram of Collison Inhaler
(click images to enlarge) Earliest Image of Collison Nebulizer from W. E. Collison's book "Inhalation Therapy Technique"

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Kenneth R. May, Inventor of the Cascade Impactor, shown in his Laboratory at the
Microbiological Research Establishment at Porton, Circa 1977.
(Image kindly provided by his son, Jonathan)

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Copy of the title page from
THE SMOKE PROBLEM OF GREAT CITIES

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The photo shown above is of the noted Atmospheric Scientist, Dr. Austin Hogan. They were taken in 1978 when he was conducting aerosol research measurements at the South Pole. Dr. Hogan is shown holding a Casella Mk2a Cascade Impactor. This instrument was specially modified by BGI at Dr. Hogan's request. All of the internal coatings were removed to present a bare aluminum surface. Subsequent modifications were made by Dr. Hogan's organization the A.S.R.C. of the State University of NY at Albany. The instrument continued in use well into the 80's.

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An amazing portrait of Pollution in a great city, at the dawn of the 20th Century.
Levels were in the order of 400 µg/m3 (probably sub PM10). Sunlight was strongly diminished.

(Ref. J.B. Cohen and A.G. Ruston, Smoke a Study of Town Air E. Arnold, London, 1912)

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1982
The BGI Auditor
A unitized high water mark for mechanical environmental calibrators

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1972 Advertisment in The Journal of the Air Pollution Control Association

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