PLATE 13 
Valve housing of the ‘‘Albatross’’ bottom-sampler. (After photographs by 
Charles De Long). 
Fig. 17. Upper view. 
Fig. 18-20. Separate pieces. 
V. H., valve housing. 
V., valve. 
L., ledge or seat upon which rests the lower end of the pasteboard tube. 
C., cap, which, when in position, covers the valve. 
Sh., shoe, bearing cutting edge. 
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