152 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



was made to identify the mineral. The powder of the 

 mineral moistened with hydrochloric acid yields in the 

 Bunsen flame the intense red color of strontium. Heated 

 on charcoal in the reducing flame of the blowpipe the min- 

 eral glows, and if fused with soda and placed uj^on moist- 

 ened silver, gives a deep stain of silver sulphide. 



Millerite. — Very beautiful specimens of miilerite from the 

 cement quarries are contained in the collection of Mr. 

 Howard Green of Milwaukee. I have not yet found an op- 

 portunity to carefully examine them. 



DIAMONDS FROM THE DRIFT. 



Three large diamonds and a number of smaller ones 

 have been found in the glacial drift of Wisconsin. There is 

 also a report of three other diamonds, one of them as large 

 as a robin's egg, which were found and subsequently lost, 

 their real character not being known. It is not improba- 

 ble that the report is correct, but there is not sufficient 

 evidence to prove it. The large diamonds have all been 

 found in the "kettle moraine " outlining the Green Bay lobe 

 of the ice sheet, though the localities at which the finds 

 were made are somewhat widely separated. Several small 

 diamonds have been found in the bed of Plum Creek, Rock 

 Elm township, in Pierce county. The report on the Pierce 

 county diamonds has been made by Mr. George F. Kunz.' 

 The writer has elsewhere- described the latest find at 

 Oregon in Dane county, and recorded facts furnished by 

 Col. S. B. Boynton of Chicago, concerning the finding of 

 the Eagle and Kohlsville diamonds. In the paper referred 

 to, the writer has also shown that the jjrobable source of 

 the diamonds found in the Green Bay lobe of the "kettle 



' On the Occurrence of Diamonds in Wisconsin. Bull. Geol. Soc. Am., Vol. 2. p. 638. 

 (1891.) 



Cf . also Min. Res. of U. S., 1889-90, p. 44C. (1893.) 



2 On a recent Diamond Find in Wisconsin and on the Probable Source of this and other 

 Wisconsin Diamonds. Am. Geol., Vol. XIV, p. 31-35. (1894.) 



