Chemical and Physical Papers. 73 



An examination of results shows that the farther west one goes 

 the softer, lighter and more absorbent the rocks become, that the 

 cementing value cannot be inferred from external appearance or 

 from the results of other tests. Much more work is needed, as the 

 present series is not extended sufficiently to warrant drawing 

 definite conclusions. 



If the results of the Deval test are taken as an index of relative 

 value and expressed by means of the French coefficient, the best 

 stone examined in this series ranges as follows: 



No. 10 Garnett, Anderson county 13.00 



No. 30 Muscotah, Atchison county 12 . 85 



No. 33 Muscotah, Atchison county 11.40 



No. 1 McCune, Crawford county. 10 . 90 



No. 21 Williamsburg, Franklin county 10.80 



No. 43 Frankfort, Marshall county 10 . 45 



No. 29 Valley Falls, Jefferson county — 9.65 



No. 19 Lawrence, Douglas county 9 . 50 



No. 5 Osawatomie, Miami county 9 . 40 



No. 3 Chanute, Neosho county 9 30 



No. 18 Lawrence, Douglas county 9 30 



As to the rank of our limestones as compared with those of other 

 sections, again using the Deval test as a basis, the following figures 

 may be given: Thirty-five Maryland naraples gave an average co- 

 efficient of 9.34; twelve Massachusetts samples, 10 4; thirty- 

 three samples from all over the United States, 6.51; the fifty-two 

 samples of this series from Kansas, 7.16. Leaving out the softer 

 from Morris, Geary, and adjoining sections, the results would com- 

 pare favorably with the above figures. 



This investigation of Kansas stone for Kansas roads is being 

 continued this year, and it is hoped to obtain more data and larger 

 results. 



