340 Obituary. 
OBITUARY. 
Professor Witt1am T. Rapper of Bethlehem, Pennsylvania, 
died on the eleventh of March at the age of seventy. Pro- 
fessor Repper was born in the village of Peilau, near the 
oravian settlement of Gnadenfrei, in Lower Silesia, Germany, 
March 7th, 1810. In early life he qualified himself for service im 
the authorities, to engage in the financial work of the Moravian 
Church, and was employed in this until 1869, residing most of 
the time at Bethlehem. At the opening of the Lehigh University 
in 1866, Mr. Reepper was appointed Professor of Mineralogy and 
Geology, and curator of the museum. He retained the professor's 
chair only three years, discharging his duties with marked success 
uring that time, but he remained curator of the museum until 
1871. The latter years of his life were spent in the scientific and 
pee “hen in which he was so much interested 
and in this branch of science he ied h position. 
The mathematical relations of the forms of crystals was a subje 
to which he gave . He was not less diligent in the 
chemical investigation of minerals, and his thorough knowledge 
of the practical side of mineralogy caused his opinion as an expert 
to be frequently sought by those enga in the mining and 
smelting of ore he discovery by him of deposits of zine ore 
from Stirling Hill, N. J., is now called Rapperite after him 
Those who knew him well will appreciate that, as the result 6 
his patient work, his contributions to scientific literature might 
have been much more numerous but for the delicate modesty and 
lack of desire for outside reputation which characterized him. | 
Professor Repper was a man of most genial and _attractive 
personal character, who will be long remembered by all who had 
the privilege of his intimate acquaintance. 
