Dc.Eim- r Vol.JXXVHr 



PLATE I 



NEGRETTI & ZAMBRA'S DEEP SEA THERMOMETER 

 IN THE SCOTTISH FRAME. 



Fig. 2. REVERSED 



Fig. 1. SET 



A Thermometer Case. 



o Groove In top of case. 



B Pivots on which case rotates. 



o Set-screw to prevent pivots working 

 loose. 



C Pin holding case erect. 



V Lever raising pin and letting thermo- 

 meter reverse. 



E Spiral spring keeping pin in place. 



F Indlarnbber band to start thermometer 

 when pin is withdrawn. 



O Flat brass spring. 



H Point attached to O to secure thermo- 

 meter in inverted position. 



h Boss in which H fits.* 



/ Vice, securing thermometer frame to 

 line. 



J Ram's-horn attachment securing line to 

 lower part of frame. 



K Messenger suspended by wire to groove a. 



L Messenger from above striking iX which 

 raises and lets A reverse, K being 

 cast loose to descend to next ther- 

 mometer. 



M Forked piece on which D rests, and 

 through which the sounding line 

 passes freely. 



m Split pin to prevent sounding line slip- 

 ping out of fork M. 



* The damping arrangement shown here is 

 now superseded by a more satisfac- 

 tory form, devised by Messrs. Negretti 

 & Zambra. 



K 



• 



B artliolomaw. EdinT 



