REMARKS ON THE CHARTS. 



BY 



M. W. CAMPBELL HEPWORTH, C.B., R.D., COMMANDER R.N.R. 



THE COLLECTION or THE DATA. 



mpxion with the scheme of International Antarctic Exploration, inaugurated at the beginning of 

 thu century, whirh attaiiiol it* fulfilment during the yean 1901-04, arrangement* were made by the 

 Hritiih Meteorological Office and the DeuUche Seewarte conjointly, prior to the departure for the Far 

 S<>uth <>f the British and German Expedition*, with a riew to obtaining synchronous observation* at 

 Noon (J.M.T. >f Uromctric prewure, air temperature, and wind frequency, during the period October, 

 1901, to March, 1903, for Latitude* South of the 30th parallel of South Latitude. 



this country special registers, in a form agreed upon by the British and German Antarctic 

 Committees, were issued to the Ships of H.M. Navy through the Office of the Hydrographer (the late 

 Rear-Admiral Sir W. J. L. WIIAHTOX, K.C.B.). A circular letter, issued by the Meteorological Council to 

 marine observers in correspondence with the Office and others engaged on Southern voyages, soliciting 

 tht-ir co-operation in this work, met with a ready response, and a large numl>er of registers were 

 di.itribiited among the Commanders of Ships visiting the Southern Ocean, and numerous contributions 

 resulted. Subsequently the period originally specified was extended to 31t March, 1904, in consequence 

 of the detention of the "Discovery " in McMurdo Sound, South Victoria Land. 



The Observatories of the Colonies in the Southern Hemisphere contributed valuable records and 

 observations in response to an invitation by the Royal Society. 



By an arrangement between the Meteorological Office and the Deutsche Seewarte, an exchange of 

 observations, recorded on board ships from which contributions on the special Registers were received by 

 the respective Bureaux, was effected. In addition to the data thus collected by the Office a Urge number 

 of observations at noon G.M.T. were obtained from the "Discovery," "Morning," "Terra Nova," and 

 " Scotia," relating to the passages of these vessels to and from the Antarctic and while cruising in Antarctic 

 Seas ; also from many stations in Cape Colony, Australasia, South America, Ticrra del Fuego, and Kcrguelen 

 Island 



AM regards information from stations in, and in the neighbourhood of, Antarctica, in addition to the 

 meteorological records kept at Winter Quarters of the " Discovery " in McMurdo Sound, observations 

 were obtained relating to the "Gauss" station of the German Expedition, near Kaiser VYilholm II. Land, 

 Laurie Island South Orkneys, and Snow Hill Inland Palmer Land, through the courtesy of the leaders of 

 the German, Scottish, and Swedish Antarctic Expeditions, Professor VON DBYOALSKI, Dr. W. S. But CE, 

 and Dr. OTTO NOBDBNSKJOLD, respectively. 



Upon the information thus obtained are based the Daily Synchronous Charts of Sea-Level Pressure for 

 Noon G.M.T., with winds and air temperature, as well as the Charts of mean monthly pressure and air 

 temperature, and the Tables of average wind and gale frequency. 



The list of contributors is as follows : 



-HIPS of the Royal Navy (H.M.S.), Exploring Vessels (KS.), Steamships (S.S.), and Sailing V 

 the Mercantile Marine, from which Observations were Received. 



a .,- 



Adolf 8. 



AtariUm 8.8. 



Adolphc 8. 



Afrir. , . . 8*. 



AleiBom. 

 Alexandra 



8. 

 8. 

 8. 

 8. 



Alnwiok CMte 



a. 



II M - 



