164 



Land Magnetic Observations, 1914-20 



I made a repeat station at Eucla, and carried on computations until November 8, 

 when I embarked on the steamer Eucla, which calls at Eucla once in 3 months, and re- 

 ported to Mr. Kidson on November 15, 1914, at Cottesloe, Western Australia. 



The stations occupied are given in the following table: 



Table 23. 



No. 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



15 



16 



17 



18 



Name 



Port Augusta 



Bookooloo 



East- West Railway Siding 



Wirraminna 



McArthur's Well 



Gilbert's Well 



Tarcoola 



Carnding Well 



Wynbring Rock-Hole. . . . 



Bench-Mark 56.J4 



Ooldea Bore 



Bore, A 



Bore, B 



Nealyon's Rock-Hole. . . . 



Mailable Tanks 



Yangoonabie 



Bunabie 



Eucla 



Date 



1914 



Aug. 



Sep. 



Oct. 



6-7 

 23 

 27-28 



1 



3 



5-6 



8 

 12-13 

 16 

 19 



23-24 

 25 

 26 



1 



4-5 



6 



8-9 

 31 



Lat. South 



32 

 31 

 31 

 31 

 31 

 30 

 30 

 30 

 30 

 30 

 30 

 30 

 30 

 31 

 31 

 31 

 31 

 31 



29.7 



54.2 



16 



10.9 



01.4 



51.4 



41.8 



27.4 



33.7 



32.8 



27.9 



30.2 



34.1 



07.0 



27.8 



28.5 



31.2 



43.3 



Long. East 



137 46 



137 22 



136 47 



136 16 



135 43 



135 06 



134 34 



134 13 



133 39 



132 46 



131 50 



131 25 



130 55 



131 17 

 130 39 

 130 05 

 129 22 

 128 53 



I left Port Augusta August 19 and arrived at Eucla October 10, a total of 52 days 

 field traveling, making an average field time of about 3 days per station. The total 

 distance traveled in the field was 814 miles, which gives an average of 45 miles approxi- 

 mately per station. The average field expense per station was $113.50. 



The country is magnetically disturbed between Gilbert's Well and Ooldea. The 

 geological formation is pleistocene and pliocene sands, limestone, etc., overlying granites 

 and gneisses, which outcrop in various places. Mount Christie, about 20 miles north- 

 west of Wynbring Rock-Hole, is known as a magnetic hill. Between Ooldea and Eucla 

 there is less disturbance, the country being mainly the miocene and eocene limestones 

 of the Nullarbor Plain. 



Assistance in many ways that promoted the success of the expedition was extended 

 by various officials and men of the country. The Engineer-in-Chief of South Australia 

 kindly gave permission to hire camels from Hergott Springs, and Mr. J. G. MacDonald, 

 in charge of the depot, supervised the selection. Chief Inspector Clode of Port Augusta 

 gave me valuable advice regarding the character of the proposed route. The mess 

 of the telegraph station at Eucla very kindly placed a room at my disposal during my 

 enforced stay. Mr. T. R. Nealyon of Fowler's Bay enabled me to make stations west 

 of Ooldea by giving the use of his motor-lorry for two days. Mr. F. M. Best, mechanical 

 and electrical engineer, accompanied me on the caravan trip and rendered valuable aid 

 in handling and managing camels, besides recording my astronomical observations. 



E. Kidson, on the General Magnetic Survey of Australia, and on an Expedition over 

 the Canning Stock-Route, Western Australia, 1914. 



This work is a continuation of the general magnetic survey of Australia, the plan 

 of which was outlined in the Director's instructions of June 21, 1911. The progress of 

 the survey to the close of 1913 is described in the Department's "Land Magnetic Obser- 

 vations," Volume II. During January 1914 I used universal magnetometer No. 14, 

 and from April to October, magnetometer-inductor No. 24, with chronometers, watches, 

 and accessories. 



