424 
LIST OF ILLUSTRATIONS. 
Page 
44. Guide for Temperature Wire 319 
45. The Tanner Sounding Machine mounted in the 
Steam Cutter . _ . 333 
46 Comparative Thenuometric Scale. Fahrenheit. 
Celsiu.s, and Reaumur 324 
4T. Reading Lens for Tanner Thermometer Case . 337 
43. Small Coniparin,g .Tai- . , . 329 
49. Comparing Jar for Deep-sea Thermometer.s 330 
50 Low tern perataire. Comparator - . .. 334 
51, 53, 53, 54, 55, 56, .57, 58, 59, 60. The Kidder Flint 
Water Bottle 343 
61. Watson & McDaniel Pressure-regulating Valve. 347 
62. Beam -trawl Frame ..... 3.53 
63. Tanner Beam trawl Frame . 3.54 
Page. 
64. Blake Deep -sea Trawl Frame 3.57 
65. The Common Dredge. 361 
66 The Chester Rake Dredge .362 
67 The Blake Dredge 363 
6,8. The Angle and Scope of the Dredge Rope. 335 
69 Imiu’oved Surface Tow Net 367 
■70 Cod Hand Line. 373 
71 Cod Trawl Line 374 
72 The Tanner Flexible Staff 377 
73 Case 1, Sumner’s Method 3.80 
74. Case 2, Sumner's Method 331 
75 Case 3, Sumner's Method 383 
76 Comparative Scale of Linear Measure, Inches 
and Millimeters 406 
