Part Four 



TECHNICAL APPENDICES 



Chapter 



I 



2 



Strength Tests made on Model Portholes 

 Magnetic Valves and Electro-magnets 

 Form of the Float .... 

 Transverse Partitions of the Float 

 Thickness of Metal Sheets of the Float 



* 



The Keels ..... 



Different Methods of Checking the Homogeneity of the 

 Metal in the Cabin 



Graph of Hinge Moments on the Door 



Passage of the Electric Cables and Tubes through the 

 Cabin Wall 



The Reciprocating Valves 



The Control Valve . 



Low-pressure Gauge 

 An Attempt at a Restatement . 

 Acknowledgments . 



3 



4 



5 

 6 



7 



8 

 9 



10 



II 



12 



Page 

 149 



152 

 160 

 161 

 i6t, 

 164 



166 



167 



169 

 176 

 179 

 182 

 183 

 189 



[ viii ] 



