d 



Cover or upper plate. 

 Hooked lever holding bottle open. 

 Striker plate. 



Springs holding up striker plate. 

 Thermometer guard. 

 Catches holding thermometer 

 guard in position ; one also 

 acts as air valve. 

 g, Air tube. 

 h, Outer cylinder. 

 i, Bottom plate. 

 /, Adjustable lugs. 

 k, (dotted lines), 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, Nansen Thermometer. 

 u, v, Extra frame for reversing ther- 

 mometer. 

 y, Swinging arms. 

 z, Distance pieces. 



Fig. 6.— Nansen-Pettersson 

 Water-Bottle (Open). 



