series of switches controlling each of the motions of the 

 arm. One of the Edgerton 300-watt lamps is mounted on 

 the arm itself, enabling the operator to concentrate light 

 upon the area from which he wishes to take samples. 

 Various sampling tools and containers can be provided. 



Air Revitalization 



This system is designed to provide the proper atmos- 

 pheric mixture within the sphere. Since the breathing 

 process removes oxygen from the air and replaces it with 

 carbon dioxide (CO s ), it is necessary to again add oxygen 

 (O s ) to the atmosphere and remove the C0 2 . This is 

 accomplished through the installation of a 38- cubic-foot 

 oxygen bottle at an initial pressure of 2000 lb per square 

 inch. Oxygen is manually metered from this bottle through 

 the use of a constant flow regulator. A spare bottle is 

 carried in the sphere. Carbon dioxide absorption is accom- 

 plished through the use of a chemical absorbent system 

 consisting of three canisters attached to a manifold through 

 which air is pulled by use of a small electrically driven 

 fan. In the future, this manifold will be fitted with a suc- 

 tion tube leading to the Fathometer, which is a partially 

 sealed unit, to draw off any ozone (0 3 ) that is generated by 

 the electric stylus of the Fathometer. A heated wire catalyz- 

 er for the ozone will be located in this suction line between 

 the Fathometer and the suction manifold on the C0 2 device. 

 The atmosphere in the sphere is regulated manually through 

 observation of instrumentation, consisting of an aircraft 

 altimeter that indicates positive or negative (vacuum) 

 pressure in the sphere, and a C0 2 and O sensing device 

 that reads in percentages. 



External Camera 



The bathyscaph is equipped with two external pressure- 

 encapsulated Edgerton cameras. These cameras are 

 capable of taking several hundred 35-mm still pictures per 

 loading. The cameras operate in conjunction with two 

 externally carried stroboscopic light units that are also 

 pressure-encapsulated. The "A-camera" is located at 

 the bow of the bathyscaph and is aimed vertically at the 

 bottom. The "B- camera" is located midway between the 

 bow and the forward ballast tub and is aimed at the same 

 bottom area as the A-unit, but at an oblique angle. Both 



24 



