BULLETIN OF THE UNITED STATES FISH COMMISSION. 



361 



B in Fig. 7 ; the lower hoop projects below the bottom sufficiently to 

 receive the wear. 



At the bottom, and at a point about one-third the height of the tank 

 from the top, are outlets O O, nozzled out an inch or so for drainage; 

 these nozzles are reinforced with a shoulder of solder all around the out- 

 side, next to the body of the tank. When the clams are to be packed in 

 mud or sand the lower outlet is stopped with a bung or a cork, the 

 mud filled in to a line even with the upper outlet; said outlet is 

 stopped aud tlie space between the level ot the mud and the top of 

 the tank filled with water, and the screen, Fig. 8, placed upon the 



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Fig. 8. — Screen for tank. 



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Fig. 7.— The Stearns tank. 



Fig. 9. — Slatted platform for tank. 



top, resting upon angle-irons, L, just below the edge, to prevent the 

 contents of tanks being molested by inquisitive persons during trans- 

 portation. All that is required when change of water is necessary 

 is to withdraw the bung or cork, run off the stale water, and again stop 

 the outlet and refill with the water from a pail, etc. 



When clams are to be carried in rock-weed, &c, then a slatted plat- 

 form, of strips of wood, nailed to cross-cleats of sufficient height or thick- 

 ness as to permit a space of three or four inches above the bottom, to 

 receive the water and to keep the rock-weed packing above the bottom 

 of the tank, so as to facilitate drainage when the water is changed, 

 which is readily done by pulling out the cork or plug which stops the 



