FISHERIES OF THE UNITED STATES. 229 



UNITED STATES COAST AXD GEODETIC SURVEY. 



Aiiparatiis for deep-sea rcsoarch, &c.— Coutiinied. 



Plate •22. Fig- 1. Case for the Xenretti-Zaiul.ra deep sea lliermoiueter. 

 Fig. 2. The Negretti-Zaiiilyra deep sea thermometer, bulb 

 up. Fig. :?. The Milk-r-Casella deep sea thermometer, 

 with the Imlhs exposed. 



Plate 23. Fig. 1. The XegiL'tti-Zambra deep .sea thermometer iu uae. 

 Fig. 2. The Negrotti-Zamhradcep sea thermometer imise. 



Plate 24. The Blake at the Washington navy-yard. The dredgiug- 

 gear ready for work. 



Plate 25. Fig. 1. Style of dredge supplied fur tlie first dredging ex- 

 pedition of the Blake. Figs. 2. A, and 4 dredge, devi.sed 

 by Lieut. Connnander C. D. Sigsl)ee. United States Navy, 

 and Master H. M. Jaeoby, I'nited States Navy, and adopted 

 for use. 



Plate 26. Fig. 1. Plan of the trawl as tirst u.sed on board the Blake. 

 Pig. 2. Plan of trawl as improved by Professor Agassiz, 

 Lieiiteuant-Commauder Sigsbee, and Lieutenant Ackley. 



Plate 27. The improved trawl ready for use. 



Plate 28. The improved trawl shown as having "tripped" after foul- 

 ing with rough bottom. 



Plate 29. Plans of the deck and apparatus of the Blake. Fig. 1 and 

 2. During the first dredging expedition. Fig. .3. During 

 the second expedition. 



Plate 30. View of the Blake's deck looking forward from the bow 



of the starboard (xuarter boat, ready for paying out the 



dredge. 

 Plate 31. View of the Blake's deck looking aft from the starboard 



side of the pilot-house, ready for dredging. 

 Plate 32. The forward side of the dredge reel and its engine, the reel 



having on it 2,700 fathoms of the steel rope recommended 



by Prof. Alexander Agassiz. 

 Plate 33. View of the main hoisting engine from the starboard side. 

 Plate 34. Figs. 1 and 2. Iron snatch-block for dredging rope. Fig. 3. 



Improved accumidator for dredging. 

 Plate 35. The plotting of a line of soundings. 

 Plate 36. Improved machine for sounding with wire. 

 Plate 37. Continuation of Plate 36. 

 Plate 38. Continuation of Plates 3il and 37. 

 Plate 39. Sigsbee's detacher. 

 Plate 40. Water specimen cup. 

 Plate 41. Curve for correcting the reading of the register pla<^d on the 



axle of the sounding reel, by Lieut. Commander C. D. 



Sigsbee, U. S. N., Assist. Coast Survey. 



LIFE-SAVING SERVICE. 



Collective exhibit. 



39256. Specifications for building vessels. U. S. R. M. 2 copies. 



39320. Annual Report Life-Saving Service for the fiscal year ending June 



30, 1878. 2 copies. 

 89333. Report of the Life-Saving Ordnance. Lieut. D. A. Lyle. 



39321. Revised Regulation Life-Saving Service. 



39318. Report Life-Saving Service, 1876. 



39319. Annual Report Life-Saving Service, 1877. 

 39294, Manual. 



