1916] MicluieJ, ef al. : Hydrogniphic Eccords of Scripps Institution 213 



E. 



Figs. D and E. Kofoid closing wuter bottle, sbowiug thermometer rack and 

 small water-sample bottle attached. D. Ajiparatus set for tripping by messenger. 

 E. After closure of both bottles and reversal of thermometer rack. Operation: 

 messenger (m.) descends cable (c.) and spreads ,jaws of clutch (j.), thus releas- 

 ing cover (CO.) and cylinder (cyl.) supported from it by a brass chain (ch.) 

 which, dropping upon base (ha.), closes bottle. Alignment of cover and cylinder 

 with base maintained by guiding sleeves (s' and s"). In closing, projecting rods 

 ()•', r", and r'") strike corresponding trips (f, t", and t'"), which releases ther- 

 mometer rack (*.'■.), allowing coiled spring (c.s.) to reverse it, and the two lids 

 (r and I") of the water-sample bottle (w.b.) to snap shut. Water is withdrawn 

 from large and small bottles by removing plugs (p' and p"). 



