Preliminary data on the work with underwater lamps
Abstract
The light intensity of normal and underwater lamps are theoretically examined. The results show the advantages of underwater lamps owing to their ability to reflect light and to the angle under which they can by used. (Fig. 1a, 1b). The needed adaptation of the electrical generator is described. With the built-in supplementary A-meter (Fig. 2), the condition of underwater lamps in the course of lighting can be controlled. At the same time, a simple and practical method of insulation of the normal bulb is described by which such a bulb may be made fit for underwater use. (Fig. 3). This method was tested at depths upwards of 50 metres and at a ship’s speed of 5 knots.
Biological observations in connexion with the employment of such underwater lamps are still in progress and will be reported in a paper to be published at a later date.
