GEOLOOTCAL T^^OTES ITT THE 



GREAT EXTI rETTTO:N'. 



344 



Tn -(11080 i-omarks wo mean notliinj^ whatovor of ])orsonal ronecfion on 

 Mr. Tindall, from whom, on all occasions wlioti w e liave ro([uired it, we 

 have received the greatest courtesy ; but we tliirik lie is mistaken in re- 

 spect to the nature both of the implements he has in his own large collec- 

 tion, as well as those he has seen in other collections. 



Our opinion is that the mass of any real {i.e. not forged) {lint-im])l(-mcnts 

 or weapons found in Yorkshire belong to a later or more immedialcly pre- 

 historic period than that of the Drift gravels, and may come from gr;ives 

 or the debris of graves or be strewed on the soil. So far as I liave seen, 

 the Yorkshire largo-pointed specimens are far smaller than even the small- 

 est of the xibbeville and other true Drift examples, and it is highly desi- 

 rable that the most reliable evidence be given to the world of their actual 

 stratigrapliical position. Mr. Tindall and other collectors and writers on 

 this topic should remember, that where the practised eye has to judge of 

 more manipulatory results, the finest and most delicate dilFerences may be 

 of the greatest value. Let Mr. Tindall supply these facts. Let him give 

 us the list of the Yorkshire implements and their localities, and give with 

 each its position in the earth's strata, or state what other relics were found 

 with it in the same grave, and then we shall have something tangible to 

 work upon, and shall not spoil good paper in vague surmises and vain as- 

 sertions. I have no preconceived views to advocate, I only want to get at 

 the truth; and I do not mind what side I take, provided only that it 

 really be the ricfitt side ; but I do think the questions involved in these 

 considerations so important that the evidence should be most searchingly 

 investigated in every case before it be accepted ; and it would be worse 

 than culpable for the editor of the ' Geologist ' knowingly to allow such a 

 jumble of historic with fossil relics to pass unravelled. Science warits no 

 man's assertion : she requires all the evidence on this topic to be well sub- 

 stantiated, and to be supported by abundant testimony. — S. J. Mackie.] 



GEOLOGICAL NOTES IN THE GEEAT EXHIBITION. 



South Australia. — The main feature in this colony is the Mount 

 Lofty Range, or Adelaide Hills, as they are indifferently called, which, 

 about 30 miles in length from north to south, rise to an elevation of 

 2400 feet, and wooded to their summit. Between these hills and the 

 sea are the great Adelaide Plains, so notable for their great crops of wheat 

 and other corn. The chief topics, however, for our notice, arc the mineral 

 products. The chief source of mineral wealth in South Australia is cop- 

 per. Tlie Burra-Burra mine has long boon famous, while the astonishing 

 yield of some of the mines on Yorke's Peninsula brings them into perfect 

 rivalry with it. Again, to the north of Spencer's Gulf mineral discoveries 

 of the highest value have been made, and only the requisite facilities for 

 transport — labour and capital — are required to develop them. It is in that 

 district that the works of the Great Northern Mining Company are in 

 0])ora(ion. 



The Ihnra-Burra mines — the vast ]iroductivencss of which is of world- 

 wide celebrity — are about 90 miles N.E. from Adi>laide, and the works 

 wore commenced, in IS 15, in the copper rock Avhich projected from 

 the surface, with ten miners, a smith, and a ca])tain. They now yield 

 employment directly to upwards of 1100 persons. Although the works were 



YOL. Y. 2 V 



