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1. 1st International Lighthouse Conference, London, 1929: Principal developments in coast lights and fog signalling—Report by J. P. Bowen, M. Inst CE

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/10

2. A new porous filling composition for Acetylene Tubes

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/9

3. Conference of Lighthouse Authorities (1929): Memorandum prepared by Messrs D. and C. Stevenson, M.M. Inst. CE, Engineers to the Clyde Lighthouses Trustees, on the trial of a fog signal sounded through the air and transmitted simultaneously by wireless telephone

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

4. Conference of the Chiefs of Lighthouse Departments, London 1929: Distant controlling device operated by very short electromagnetic waves by M. P. Besson, Ingénieur des Ponts et Chaussées.

Date:
8 Apr 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/6

5. 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

6. 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

7. 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

8. 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

9. Covering letter from London Trinity House to the Humber Conservancy Board

Date:
7 May 1929
Extent:
1 item
Reference No:
C DPD/1/3/12/5/20

10. Developments and modications that have taken place in the Danish Lighthouse Service since the International Navigation Congress at Cairo in 1926

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