LIST OF FIGURES. 



Introduction. 



Figure " Vol. I. page 



A. Track of the " Blake " (U. S. C. S. 1 ). In pocket at cud of Vol. I. 



B. Morro Light and Castle, Havana, with modern limestone terrace in 



foreground, from a photograph ....... xii 



C. Western Slope of St. Kitts, from a photograph xv 



D. Pitons of St. Lucia, from a photograph ....... xvii 



E. Kingstown, St. Vincent, from a photograph ...... xviii 



I. Equipment of the "Blake." (Figs. 1-33.) 



Frontispiece. U. S. Coast and Geodetic Survey Steamer " Blake " (U. S. C. S.) 

 Brooke's detacher (Sigsbee) ...... 



Sir William Thomson's sounding machine (Thomson) 

 Sigsbee's sounding machine (Sigsbee) .... 



Sigsbee's sounding machine, profile (Sigsbee) . 

 Sigsbee's sounding machine, end view (Sigsbee) 

 Sigsbee's detacher and Belknap sounding cylinder (Sigsbee) 

 Section of Fig. 6 (Sigsbee) ...... 



Belknap's cylinder detached from shot (Sigsbee) 



Comparative size of hemp and wire used for sounding (Sigsbee) 



Sounding lead witli Stellwagen cup (Sigsbee) . 



Miller-Casella thermometer, -j • • 



Negretti-Zambra thermometer, Italian model 



Siemens's sinker and resistance coil (Bartlett, U. S. C. S.) 



Wheatstone's Bridge (Bartlett, U. S. C. S.) . 



Siemens's deep-sea thermometer (Bartlett, U. S. C. S.) . 



Hilgard's salinometer (Sigsbee) ..... 



Sigsbee's water cup (Sigsbee) ...... 



Section of Sigsbee's water cup (Sigsbee) 

 Mode of attachment of cups and thermometer (Sigsbee) . 

 Miller-Casella thermometer in protecting case, with Sigsbee's attach 

 ment (Sigsbee) ....... 



O. F. Midler's dredge (Thomson) ..... 



" Blake " dredge frame ....... 



" Blake " dredge 



Bar and tangles ........ 



" Blake " trawl (Sigsbee) 



"Blake "trawl 



1. 



•j. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 



21. 

 22. 

 23. 

 24. 

 25. 

 26. 



3 

 4 



6,7 

 7 

 8 

 10 

 10 

 10 

 12 

 12 



15 

 16 



17 

 18 

 19 

 21 

 23 

 23 

 23 



23 

 -4 

 24 

 21 

 l'.-. 

 26, l'T 

 26 



1 The authority from which tin figure is derived is inserted in parentheses. U.S. C. S. = 

 United States Coast Survey. 



