Appendix 1 ) 



K Ml CABLES OF LIMESTONE ANALYSES 



i;\ i:i>\\ in ( ECKEL C. E. 



limestone analyses which follow this section were collected 

 l»v Dr Beinrich Kies. They have been carefully rearranged and 



i in this office. Each analysis has been compared with its 

 il published record, and the tables are, it is believed, en- 

 tirely reliable. 



A the suggestion of Dr F. J. H. Merrill the present writer has 



a key to the tables of analyses to facilitate reference. 



This key IB based on composition, and will be of use in determining 



the areas from which limestones of any given composition may 



obtained. A table has been prepared in which its results are 



summed up, classified both by composition and by states. 



For most commercial uses the components of greatest interest 

 in a limestone are its lime carbonate, magnesium carbonate, and 

 silica plus alumina. The limestones whose analyses are given in 

 following tables have, therefore, been first divided into four 

 primary groups, the grouping being based on the percentages of 

 lime carbonate in the rock. Each of these primary groups is then 

 subdivided, according to the percentages of magnesium carbonate 

 present. Finally, the secondary groups thus obtained are again 

 divided according to the percentages of silica and alumina con- 



Aa shown in the summary below, 20 groups 



KBl TO GROUPING 



' p Group 1 



I 



tarbonate less than :/< Group 2 



i carbonal Group 3 



