In figure 8 the left most one has been removed. The supports 

 for the horizontal driveshaft were plaoed high enough to give 

 clearance for the tanks when hoisted for cleaning* 



It was not easy to find a suitable location. Several requia-e- 

 ments had to be kept in mind: 



la The water must be reasonably clean and so no source 

 of dirty nor fresh water must be nearby* 



2a The site mast not be subject 'to heavy v;ave movement, 

 3» There must be no important marine traffic because 



of danger of collision, disturbance and condensation- 



Tsrater, 

 4o The distance to centers of the lobster industry must 



not be too great with a view to the acquisition of 



seed~lobstc'rs and the planting of young lobsters, 



5, The current must not be too strong, 



6, The distance to rapid transit and a fairly large 

 community must not be too great in the event motor 

 repair or replacement is required, 



A site satisfying all those requirements is not to be found 

 in the waters of Zeelaud, particularly a combination of 1 and 2, 



Most suitable seemed a location in the Zandkreek riot far 

 from the Ooster Scheldt, in the so-called Katsclie Gaat.je , 



The conditions enumerated \mder 1, 3, 4 'and 5 \wre net 

 entirely here, tlie one under 2 only partly, but that under 6 

 not at all* 



As to wave action, this could be fairly severe altliough vre 

 have had no heavy storms. At times it \ms bad enough hovrevcr to 

 cause seasickness among members of the personnel who were not 

 imraune to that discomfort. Rather severe damage to the install- 

 ation occurred only once but the risk seemed too great to choose 

 this particular site as a permanent one* 



Tovjing the raft from Tholen to the Zr^ndlcreek gave some diff- 

 iculties since the fhce of the tanks offered strong resistance to 

 the water causinj^ the front end of the raft to pitch dovmiTard. 

 Hoisting the tanks halfivay and a reduction in speed overcame this 

 ■ hovj-ever • 



At the conclusion of the t ests the installation was returned 

 to Tholen in August,, partly disassembled and stored, 



in 1920 a nev; site was chosen, an oyster bed inside the dike 

 near the harbor entrance to Bergen-op-Zoom, 'This turned o ut to be 

 a great improvement. Most important was no doubt that the temper- 

 ature here was in general higher than in oiJttside water. 



131 



