186 



DEEP BOREHOLE SURVEYS AND PROBLEMS 



Haussmann's Apparatus. — This apparatus was invented 

 by Prof. Karl Haussmann at the Technical High School in 

 Aix la Chapelle in 1907. It is essentially a double magnetic 

 needle, spirit level and photographic device and has com- 



Surface 



6160, N50E 

 603O'N4O°E- 

 5900M44°E-: 

 5812'' ■ 



5500'; 



'6050'4 5° 



, ,„ 6l60'45°Bo-HomofDeflecfion 



6600^8 

 &656'°gof fo^ of'fiole 



Fig. 125. — Course of a South African drill-hole, vertical and horizontal views. 

 {After J. I. Hoffmann by permission of the Institution of Mining and Metallurgy, 

 London.) 



manded such respect for a long time on the Continent 

 that we shall enter into some detail regarding it. 



Figure 126 shows the assembled plumbing cylinder with 

 guide springs and an attachment for the core cather below 

 and one for the rope or rods above. The conductor cable 

 runs along the rods and down into the interior of the cylin- 



