146 PROCEEDINGS OF THE INDIANA ACADEMY OF SCIENCE. 



samples were thus examined, in no single instance were we able to detect the 

 presence of mineral poisons in the quantity of water possible to submit to 

 analysis in the field. And the various plants which it Avas claimed would, 

 if eaten by cattle, bring on the disease, when put to the crucial test, were 

 likewise found to be harmless." 



"I am sorry that the notes taken while engaged in this investigation have 

 been mislaid or lost, and cannot be referred to now. The investigation led 

 us to this conclusion, that, though the cause could not be attributed to the 

 vegetation or poisons in the water, that the prevailing formation in the neigh- 

 borhood of the disease was argillaceous shales — and that the disease was 

 brought about by some form of miasma similar to that which produces chills 

 and ague; in other words, it is zymotic; and that the clay shales, which are 

 microscopic in an eminent degree, had or may have had something to do 

 \\ith its formation." 



CoLLETTs' First Report on Geology. 



The second volume issued by the Bureau of Statistics and Geology con- 

 tained 164 pages and 11 plates devoted to the latter subject. Two thousand 

 copies of the portion on Geology, were printed separately, and the work is 

 therefore known as Collett's first report on Geology. Issued in 1881, it con- 

 tained the results of the geological work done in 1879 and 1880, which, on 

 account of the small sum available, was very little; Collett giving the ex- 

 penditures for the geological work done in the two years as follows: 



Traveling expenses of Chief of Bureau $65 . 00 



Survey of Monroe County, Mr. Greene 150. 00 



Survej^s in other districts, Mr. Greene 15. 00 



Drawing figures for Prof. White's paper, Mr. McConnell . 65 . 00 



Drawing maps, Mr. Morrison 20. 00 



Synopsis of Mollusca, Dr. Stein 25 . 00 



Increase of cabinet 50 . 00 



Total $505.00 



In a brief introductory chapter headed "Geology of Indiana," he states 

 that "During the last year a company was organized at South Bend, which 

 has since been engaged in the manufacture of Portland cement from the 

 gray clays and calcareous marls found along the shores of the ancient lakes 

 of St. Joseph County." This was the pioneer Portland cement factory in 

 Indiana, and was the first one in the United States to successfully use marl 

 and day as the cement ingredients. It was operated on a small scale until 

 1894, the output never exceeding 20,000 barrels a year, or about one-third 

 the amount produced each day by the large mills now operating at Mitchell, 

 Indiana. Collett gives the results of anah'ses of the raw materials and the 

 completed product, made by Hurt}^ together with those of tests showing the 

 tensile strength of the latter, and states that "the tests afford convincing 



