Preliminary assessment of core recovered from drill holes Nos. 22, 23, and 24, King Island.

The Nelson Bore, which is still in progress and is being drilled with the Commonwealth Rotary plant in collaboration with the Victorian Mines Department, has now reached the depth of 3746 feet, with no indication that the basement rock will soon be reached. Unfortunately no bore in Western Victoria or south-eastern South Australia has been drilled to bedrock, consequently no suggestion can be made as to the possible depth at which it will be met in the present bore. The deepest bore in the area to be palaeontologically examined is Knight's Dome, No. 2, Mt. Gambier, South Australia, which reached the depth of 2013 feet, drilling ceasing in carbonaceous sands.

No. 2 Bore, Boronga is situated north of Moree, near the New South Wales - Queensland border. The samples forwarded for microfaunal examination were from between the depths of 25 feet and 2104 feet.

The series of samples forwarded for micro-palaeontological examination was from the depth of 1275 feet down to 1553 feet and was in continuation of that reported upon on 19/1/42.

The Pink Lakes, also known as Linga Lakes, lie in the Parish of Mamengoroock, Country of Weeah, in north-western Victoria, about 10 miles north-north-east of the small town of Underbool on the Ouyen to Pinnaroo railway (See Fig. 1). The three lakes known as the Pink Lakes that are being worked for salt are Sailor Lake, Lake Crosby and Crescent or Home Lake. The areas of the salt leases are: Sailor Lake leases, 206 acres; Lake Crosby leases, 395 acres; Crescent Lake leases, 311 acres. Portions of the above areas are occupied by the beaches and fore-shores of the lakes, and the total potential salt-bearing surface of the three lakes is actually about 700 acres. In addition to the Pink Lakes above-mentioned there are in the vicinity two other salt lakes viz: (a) Lake Poulton, about 70 acres in area, and two miles west of Lake Crosby, and (b) an un-named lake, here referred to as 'School' Lake, probably rather less than 50 acres in area and situated one mile south of the west end of Crescent Lake. Salt is formed on both these lakes, but Lake Poulton is somewhat difficult of access on the north-east and north, and School Lake is in a Government Reserve and is not available for leasing. The geology and salt resources of the Lakes are outlined. Several proposals, put forward with a view to increasing the yield of salt from Pink Lakes, are discussed herein.

During July 12th-27th an initial examination and mapping of the suface and underground workings were carried out at the Great Central mine. A further examination was made of the surface of the mine on August 26th-27th. At the time of this second visit sampling had exposed fresh faces along most of the drives and crosscuts, and workings in McKenzie's and West Shafts not previously accessible were inspected.

Report on the facts and cost of maintaining and increasing production at the Mount Bischoff tin mine, Waratah, Tasmania.

Two reports on the Costerfield Gold-Antimony veins have been published. Bulletin No. 50 of the Victorian Geological Survey, by H.S. Whitelaw gives an account of the lodes and workings and of the history of the mine. An excellent description of the reefs and the mineralisation by Dr. F.L. Stillwell appeared in the proceedings of the Australasian Institute of Mining and Metallurgy, New Series, No. 48, 1922. In view of the existence of these publications, repetition of the details of Costerfield history, workings and geological features is avoided as much as possible in this report, and they are merely summarised in order to present the essential facts concerning the mineralised system.

The relevant portions of letters from Non-Metallics Limited addressed to Mr. J.M. Newman, setting out the reasons for their Application for a Commonwealth Grant, and the details of the Company's position are reproduced here.

This report deals with the results of a geophysical test survey which was carried out in the vicinity of the Burra mine between March 4th and 13th, 1942.