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25431. Conference of the Chiefs of Lighthouse Departments, London 1929: Note on the Efficiency of Projection Apparatus by M. André Dargenton

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/2

25432. Conference of the Chiefs of Lighthouse Departments, London 1929: On the Acoustic Beaconing of an Alignment. Principle of the arrangements of the emission of sonorous waves for the production of a plane of silence following a given alignment and for its periodical balancing by Monsieur A. Blondel, Inspecteur Général des Ponts et Chaussées, Membre de l'Insitut.

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/5

25433. Conference of the Chiefs of Lighthouse Departments, London 1929: Recent progress realized in French Wireless Beacons by MM. A. Blondel, Inspecteur Général des Ponts et Chaussées, Membre de l'Insitut, et P. Besson, Ingénieur des Ponts et Chaussées

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/3

25434. Conference of the Chiefs of Lighthouse Departments, London 1929: Theorem on the Refraction of the Pencils of Rays. Appliance to the calculation of the brightness by M. André Dargenton

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/4

25435. Conferment of the Freedom of the City to R.A.F. Patrington

Date:
16 May 1970
Extent:
1 item
Reference No:
C SRL/E/93

25436. Conferment of the Freedom of the City upon 440 (Humber) Light Anti-Aircraft Regiment

Date:
24 Sep 1960
Extent:
1 item
Reference No:
C SRL/E/87

25437. Confidence

Date:
25 Jan 1886
Extent:
1 item
Reference No:
C DPF/3/374

25438. Confidence

Date:
23 Jul 1888
Extent:
1 item
Reference No:
C DPF/5/374

25439. Confidence

Date:
11 Jul 1887
Extent:
1 item
Reference No:
C DPF/4/354

25440. Confidence

Date:
14 Feb 1887
Extent:
1 item
Reference No:
C DPF/4/353