R.R.S. 'DISCOVERY': SCIENTIFIC EQUIPMENT 



165 



machines is seen in Fig. i. It will be noticed that the recording sheave is hung 

 low down on the samson post, in which position it can easily be read and the indicator 



Fig. I. Section of rail of R.R.S. 'Discovery', showing light deck machine for hydrological or 

 plankton work, with arrangement of boom, outboard platform, accumulator, etc. 



adjusted when necessary. For vertical nets in particular a considerable distance between 

 water level and jib sheave is required, and if the recording sheave were slung from the 



