VI ILLUSTRATIONS. 
Bulletin No. 53. 
I»age. 
Plate I. Geological map of Nantucket Island Frontispiece 
II. Aspect of kaine moraine on the northern border, near Shemo Point.. 16 
III. Kame valley, with dome-shaped hill, looking south, on uorth road, 
near Shemo Point 18 
IV. Topography of kame moraine in central district, near north end of 
Long Pond, looking north 20 
V. East branch of Hummock Pond, looking south 22 
VI. Junction of kame moraine and terrace plain on Gibbs Pond; Siascon- 
set in distance 26 
VII. Sankaty Head, looking north from a point 150 yards south of light- 
house 30 
VIII. View of coast escarpment 500 yards north of Sankaty light 40 
IX. Aspect of north shore from near upper end of Long Pond, looking east. 46 
X. Split pebbles, resembling stone implements 50 
Fig. 1. Diagrammatic horizontal section of small spit on Coatue Beach 13 
2. Diagrammatic section through Coatue Beach 15 
3. Genera] ized section of Squam Head 16 
4. Section at Wee wocket 16 
5. Section of border of Lily Pond 16 
6. Section from Coatue Bay to the ocean 17 
7. Diagrammatic section across valleys in sunken plain 20 
8. Diagrammatic section 'showing positions of bowlders on surface of 
glacial plain near Gibbs Pond 21 
9. Section of submerged swamp on north shore 28 
10. Section at Sankaty Head 32 
11. Diagrammatic section of beds at Sankaty Head 39 
12. Section 500 yards south of beds at Sankaty Head 41 
13. Section showing apparent beach line, near Gibbs Pond 45 
14. Karnes east of Nantucket village 45 
15. Section of shore east of Surf Side, showing beginning of coast apron. 50 
16. Profile across Great Head, showing dunes 51 
Bulletin No. 54. 
Fig. 0. Disposition of apparatus for air thermometry and boiling point . Frontispiece 
1. Apparatus for constant temperature between 0° and 100° 59 
2. Apparatus for constant temperature between 100° and 300° 60 
3. Boiling-point apparatus for mercury 61" 
4. Boiling-point apparatus for zinc ; earlier form 63 
5. Boiling-point apparatus for zinc ; later form ; longitudinal section.. 65 
6. Boiling-point apparatus for zinc ; later form; cross-section 66 
7. Boiling-point tube for mercury ; original form 84 
8. Boiling-point tube for sulphur; original form 85 
9. Boiling-point tube for water, etc.; original form 86 
10. Boiling-point tube ; perfected form 87 
10a. Boiling-point tube for annealing long vires 87 
11. Boiling-point tube for pressure work 88 
11a. Boiling-point tube for pressure work with accessories 88 
12. Ring burner 89 
13. Original form of boiling-point crucible 91 
14. Perfected form of boiling-point crucible 92 
14a. Boiling-point crucible for pressure work 94 
15. Boiliug-point crucible with open tube 94 
16. Machine for pressing porcelain insulators 96 
