392 
VEB CARL ZEISS JENA 
Levelling Instrument 
Ni 004 
JENA made 
Levelling instrument—providing high and exceptionally high 
accuracy with built-in rocking plate micrometer, for series 
levelling coordinated with official systems, determination 
of height of fixed points in the locality and depth gauging 
of waterways, measuring of heights in geophysics, height 
observations in regions of subsidence, precise measuring of 
construction projects and the erection of heavy machinery. 
Standard error for 1 kilometer double level plus-minus 0.4 
mm, 44 X telescope magnification, 10" coincidence level. 
Representatives in all parts of the world