Page:A Voyage of Discovery and Research in the Southern and Antarctic Regions Vol 1.djvu/22

xiv "As regards the first branch of the question referred to their consideration, they are of opinion that the stations which have been suggested to them, viz. Canada, St. Helena, the Cape, Van Diemen's Land, and Ceylon (or Madras), are well selected, and perhaps as numerous as they could venture to recommend, considering the expense which would require to be incurred at each, and, that in each of these stations it would be desirable,

1st. That regular hourly observations should be made (at least during the daytime) of the fluctuations of the three elements of variation, dip, and intensity, or their equivalents, with magnetometers on the more improved construction, during a period of three years from their commencement.

"2ndly. That on days, and on a plan appointed, agreed on in concert with one another and with European observatories, the fluctuations of the same elements should be observed during twenty-four successive hours, strictly simultaneous with one another, and at intervals of not more than five minutes.

"3rdly. That the absolute values of the same elements shall be determined at each station, in reference to the fluctuating values above mentioned, with all possible care and precision, at several epochs comprehended within the period allowed.

"4thly. That in the event of a naval expedition of magnetic discovery being despatched, observations be also instituted at each fixed station, in