A visit was paid to Wiluna on July 28th and 29th, and an inspection made of the underground workings and of the plant. The extraction programme and production of arsenic at Wiluna are discussed in this report.

The following summary of deposits of lithium-bearing minerals in Australia has been compiled from office records, including the previous statement on amblygonite deposits by P.B. Nye, and reports on Western Australian deposits by H.A. Ellis of the Geological Survey of the State. Much of the information on the Northern Territory deposits has been obtained from an article by A.E. Williams in 'Chemical Engineering and Mining Review' of July, 1940. A discussion of Australian sources by State and Territory follows in the report. A summary of Australian amblygonite production figures for 1905 to 1943 is included.

Four core samples were submitted by New Occidental Gold Mines N.L. on 4th December, 1944. The descriptions of the samples that follow are based on a brief megascopic examination of the cores by H.B. Owen, Geologist of the Mineral Resources Survey. The results of tests for magnetic orientation and susceptibility are described.

A collection of cores was sent by the Zinc Corporation for the purpose of magnetic orientation of bedding planes. The collection consists of seven pieces mostly of short length. The results of the magnetic tests, and recommendations for future testing, are discussed in this report.

Note that this record includes Record 1945/014 by the same author. The Arcadia bore is situated in the parish of Arcadia, county of Westgrove, 85 miles north of Roma and 40 miles north-north-east of Injune. Drilling operations extended from 1936 to 1939 and were carried out by Drillers Limited. The bore was drilled in a large dome structure developed in Triassic and Permian sediments. The Arcadia bore is the second deep bore in Queensland from which a comprehensive series of samples has been examined for their microfaunal content. This examination was carried out on 1,256 samples consisting of drill cuttings taken over every five feet and of cores taken at numerous depths below 4,112 feet. The findings from the examination of these samples are described in this report.

This report describes magnetic investigations made at East Arm, for the purpose of determining whether a certain area would be suitable as a site for an aircraft compass swinging base. A similar survey was made on an adjoining area in December, 1944 (Report No. 1945/1) where magnetic conditions were found to be satisfactory but for other reasons the general design was altered and the site of the proposed swinging base was moved from that area. On 9th June, 1945, a request for investigation of the new site was submitted. The instruments used and the methods employed were similar to those used in the December survey and the report on that survey should be consulted for details of the same. The results of the survey are discussed here. Two accompanying plans are included.

Notes on beach sand workings by company at September 1st, 1945.

This mine, which is also known as the Magword Antimony Mine, is situated about 30 miles easterly from Guyra. The geology and workings of the mine are discussed in this report.

Report on six samples of limestone from localities in Flinders Island, Tasmania.

Report on mine maintenance, costs, equipment, employment, reserves, and workings.