to the Antarctic Regions. 199 



spondence with those to be made at the fixed observatories, accord- 

 ing to a plan concerted with the officers of those observatories, and 

 with Professor Lloyd, the particulars of which will be furnished to 

 each party concerned, and distributed to all the European and other 

 observatories. 



4. A circumnavigation of the Antarctic Pole, with a view to afford- 

 ing opportunities and proper stations for magnetic and other obser- 

 vations. 



5. An inquiry into the actual position of the southern magnetic 

 pole or poles, and the points or foci of greatest and least total and 

 horizontal intensity, and into the course and figure of the isodynamic 

 ovals presumed to occupy the area of the South Atlantic. 



6. The determination of the length of the invariable pendulum 

 at several stations in high south latitudes. 



7. Observations of the tides, i. e. of the heights and times of high 

 water, made at such stations at which the ships may remain long 

 enough, and at' which the correct establishment is unknown. 



8. The keeping of a regular meteorological register in both ships 

 during the whole voyage, and the paying attention to the pheno- 

 mena of solar and terrestrial radiation, and generally to all pheno- 

 mena bearing on the subject of meteorology. 



9. The temperature of the sea at the surface and at stated mode- 

 rate depths should be observed as frequently as possible, and when- 

 ever opportunity may occur, also at the greatest depths attainable ; 

 and attention should be directed to the temperature of currents and 

 shoals, as well as to its variation on approaching land. The tem- 

 perature of the soil at various depths should be taken on landing, as 

 well as that of springs, wells, &c. 



10. Soundings should be attempted in deep seas, and specimens 

 of the water brought up be preserved for future examination. 



11. Observations should be collected of the aurora in high south 

 latitudes ; and attention directed to meteors and shooting stars on 

 those occasions when experience has shown that they occur peri- 

 odically in great abundance ; as well as to the appearance of the zo- 

 diacal light, and other phenomena of a similar occasional nature. 



12. Observations of the comparative brightness of southern stars 

 should be procured, and especially of the variable stars a Hydras 

 and jj Argus. 



13. The amount and laws of horizontal refraction, both celestial 

 and terrestrial, in high south latitudes, should be investigated. 



14. The phenomena of eclipses should be attended to. 



