LIST OF ILLUSTRATIONS. 



PLATES. 



1. — Chart, showing the discoveries, tracks, and surveys of the Arctic Exploring Expedition 

 of 1860 and 1861 : I. I. Hayes, M. D., commanding. Newly projected from revised 

 materials, for the Smithsonian Institution, by Charles A. Schott. Scale 1 : 1,200,000 



Title 2^0'9e 



2. — Chart, showing the vicinity of Port Foulke, the winter-quarters in 1860 and 1861 of the 

 Arctic Exploring Expedition of Dr. I. I. Hayes. Reduced and projected from the 

 original chart for the Smithsonian Institution, by Charles A. Schott. Scale 1 : 110,000 70 



3. — Chart of Iso-magnetic lines in the vicinity of Smith's Strait. Constructed for the Smith- 

 sonian Institution March, 1865 ...... 



4. — I. First series of tides at Port Foulke, November and December, 1860 ; and second 

 series of tides at Port Foulke, June and July, 1861 ..... 



5. — II. Second series of tides at Port Foulke, June and July, 18C1 (continued) 



6. — III. Port Foulke tides. Separation of the diurnal and semi-diurnal waves, November 

 and December, 1860 . . ... 



112 



164 

 164 



164 



WOO D-C UTS. 



Pendulum used in experiments .... 



Diurnal variation of magnetic declination in winter at Port Foulke 

 Tide gauge used at Port Foulke .... 



Diagram showing form of tide wave (marked A) 

 Half-monthly inequality in time of tides at Port Foulke (marked B) 

 Half-monthly inequality in height of tides (marked C) 

 Composition of waves (marked D), November 30 and December 8 

 Cotidal chart of the West Greenland seas (marked E) 

 Annual fluctuation of the temperature of the air at Port Foulke 

 Annual inequality in the diurnal amplitude of the temperature at Port Foulke 

 Diurnal fluctuation of the temperature ; mean annual value 

 Diurnal fluctuation of the atmospheric pressure 

 Oscillation of the barometric column during storms. November 9, 10, 1860 

 " " " " February 10, 1861 



" " " " April 17, 1861 



29 

 81 

 115 

 132 

 149 

 151 

 160 

 163 

 181 

 185 

 185 

 217 

 220 

 220 

 221 



(V) 



