| RefNo | EC/1956/15 |
| Previous numbers | Cert XVI, 162; A04948 |
| Level | Item |
| Title | Mitchell, John Wesley: certificate of election to the Royal Society |
| Description | Citation typed |
| Citation | Dr. J.W. Mitchell is known for his work on the borderline between physics and chemistry about the adsorption of gases on surfaces, on catalysis and on the processes occurring in photographic emulsions. With the latter end in view he has investigated in some detail the properties of silver halide crystals; he was the first to demonstrate networks of dislocations in a transparent crystal by making silver precipitate along them so that they become visible under the microscope. He has also shown by careful experimental work the role of the dislocations in providing sensitivity centres and their relation to such sensitisers as silver bromide. He has shown why the grains of the emulsions grow in a plate-like form with the octahedral faces exposed, and demonstrated the presence in such crystals of three dislocations meeting in a pint, which determines the crystal form. |
| Proposers | From personal knowledge. N F Mott; C E H Bawn; W E Garner; E J Bowen; C R Burch; F C Frank; C F Powell; E G Cox; A M Tyndall; J S Anderson |
| AccessStatus | Open |
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Fellows associated with this archive
| Code | PersonName | Dates |
| NA7831 | Mitchell; John Wesley (1913 - 2007) | 1913 - 2007 |