Chapter III 



35 — 



Collecting Samples at Sea 



duced while cutting the sections. Then, using another sterile instrument 

 reseml)ling a cork borer, radially central sections are dissected out and 

 transferred cither to sterile sample bottles for future reference or directly 

 to enrichment media. 



The principal innovation of the mud sampler designed by Henrici and 



-5/&* STEEL ROD WELDED TO SHAFT 



■2 ^^" STANDARD PIPE SHAFT s' LONG 

 HOLES TO PERMIT ESCAPE OF WATER 



m 



540 POUNDS OF LEAD CAST IN NINE 

 ■ PIECES FORMING STREAM-LINED MASS 

 22 LONG & ICf DIAMETER 



FLAT STEEL RING TO SUPPORT WEIGHTS 



BRASS RODS TO GUIDE VALVE 

 RUBBER STOPPER VALVE- 2* DIAMETER 

 BRASS VALVE SEATING 



SAFETY ROPE 

 -BOLT TO HOLD CORE-TUBE IN PLACE 

 SLEEVE WELDED TO VALVE 



. , STANDARD PIPE CORE-TUBE ./, 

 5,IO,I5',OR 20' LONG 2" OR 2^ DIA. 



•CORE- LINER. 



NOSE 



Fig. 4. — Coring device described by Emery and Dietz (1941) for collect- 

 ing long mud cores from the deep sea bottom. 



McCoy (1938), for collecting profile samples of mud of semifluid consist- 

 ency for bacteriological analysis, is a series of small threaded holes drilled 

 at intervals along the side of the sampler tube. These holes are fitted with 

 slotted, threaded plugs which may be removed to provide for the aseptic 

 removal of mud samples with a pipette at different levels. The holes can 

 also be closed with paraffin plugs or covered with a strip of adhesive tape. 



