26 
into the Iberian Basin, we have undertaken hydro- 
graphical and radiological investigations there, 
Thereby, we confined ourselves, in 1966, to an area 
in the region of the Iberia Abyssal Plain (42° N to 
43° N and 14° W to 15° W), which was intended for 
an initial trial dumping. Our further investigations 
in 1968, 1970, and 1974 were concerned with the 
Iberian Basin between the Bay of Biscay and the 
Azores, and southwards as far as the latitude of 
Gibraltar. However, the concentration of the measure- 
ments continued to be in the region of the Iberia 
Abyssal Plain (42°N to 43°N, 14°W to 15°W), where 
a single trial dumping had taken place in 1967. 
Acknowledgements 
We thank the then Federal Minister for Scientific 
Research and the Federal Minister for Education and 
Science for granting the research funds, without 
which a great part of the investigations could not 
even have been possible. 
Thanks to the efforts of the ship's commands 
and crews of the R.V., Meteor" under the leadership 
of the respective captains = Feldmann, Fietz, Lemke, 
and U, Meyer —- during the cruises nos. 3, 15, 21, 29, 
and 33, the investigations were successful; also - at 
times - under very heavy sea conditions. 
Our thanks apply also to the colleagues who 
supported us during the measurements and who undertook 
the data processing. For hydrography: Dr. Huber, Messrs. 
Hübner, Kempe, Neu, Dr, Neumann, Messrs, Wegner and 
Wünschmann, It was not always easy to cope with the