a, Cover or upper plate. 



b, Hooked lever holding bottle open. 



c, Striker plate. 



d, Springs holding up striker plate. 



e, Thermometer guard. 



/, Catches holding thermometer 

 guard in position ; one also 

 acts as air valve. 



g, Air tube. 



h, Outer cy Under. 



i, Bottom plate. 



/, Adjustable lugs . 



k, (dotted Unes), Locking lever 

 which engages with the lug 

 when the bottle is closed. 



/, Sinker. 

 m, Large rubber washer. 



n, Outlet for water. 



p, Small rubber washers. 



r, Inner insulating cylinders. 



s, Nut holding thermometer. 



t, Nans en Thermometer. 



u, v, Extra frame for reversing ther- 

 mometer. 



y, Swinging arms. 



z, Distance pieces. 



FIG. 6. NANSEN-PETTERSSON 

 WATER-BOTTLE (OPEN). 



