'Trans. Roy. Soc. Edin. 



Dr. H. R. MILL on Clyde Sea Area. Plate lO. 

 COLLECTION OF WATER SAMPLES. 



Vol. XXXVI. 



SECTION OF MILL'S 

 SELF-LOCKING WATER-BOTTLE (Open). 



WATER-BOTTLE (Closed). 



Pig 3. 

 a a Central Tube. 

 b Base Plate. 

 c Indiarubber Ring on which the edge 



./rests when the bottle is shut. 

 d Stop-cock for running off water. 

 ' e Stop-cock for admitting air. 

 / Edge of Slip Cylinder. 

 g Metal Guides for Cylinder. 

 k Indiarubber Saucer on which the 



flange i rests when the bottle is 



shut. 

 i Knife-edged Flange. 

 j j Outer Tube protecting lock. 

 k Flanged Gallery on head of Slip 



Cylinder. 

 / / Springs sustaining Slip Cylinder. 

 m Tube which when forced down 



withdraws Springs / / from Ledge 



k and allows Cylinder to slip. 

 n Indiarubber Buffer. 

 o Locking Springs projecting through 



windows in Outer Tube j and 



catching on the floor / of Gallery 



as the botiie closes. 



ENLARGED PLAN OF LOCK. 



Fig. 3. 



q q Slots in side of Gallery/. When 

 the bottle is to be opened, the 

 locks resting on / p, the Slip 

 Cylinder is rotated until the 

 Springs o o fall into the Niches 

 q q; then the Cylinder may be 

 raised and suspended by the 

 Springs / /, care being taken to 

 hang it so that when it slips' o o 

 will catch at the points p p, or 

 near them. 



-o i: 





f 1 



Fig 1. 



A Water Bottle. 



B Toggle by which the line is secured. 



C Sounding Lead. 



D Bottle for water — sample being 



filled by an indiarubber tube. 

 o a Locking Springs pressing down 

 floor of Gallery k. 



1 1 Detaching Springs withdrawn from 

 ledge of Gallery k by pressure of 

 Tube in driven by Messenger r 

 dropped from the lowest thermo- 

 meter. 



Fig. 2 



Fig. 1. 



Fig. 4. 



ARRANGEMENT FOR COLLECTING 

 WATER SAMPLES FROM SLIGHT DEPTHS. 



A Cilass-stoppered Bottle. 



B Sounding Line. 



C Thin Line to withdraw Stopper. 



.Ill) ll!4 fDlf 



