LIMESTONES. 



95 



TABLE 31. 

 ANALYSES OF VARIOUS MOLLUSCAN SHELLS. 



1. Oyster-shell. L. P. Brown and J. S. H. Koiner, analysts. Amer. Chemical Journal, vol. 11, 

 pp. 36-37. 



2-3. Oyster-shell. How, analyst. Amer. Journal of Science, 2d series, vol. 41, p. 380. 



4. Mussel-shell. " " " " " " " " 



5-6 Periwinkle-shell. " " " p. 379-381. 



At various points where the oyster-canning industry is largely 

 developed oyster-shells are burned into lime. An important lime- 

 burning industry is, for example, based upon the use of waste oyster- 

 shells at Baltimore, Md. In the case of the lime whose analysis is 

 given below the shells had been charged, mixed with small anthracite, 

 into a cylindrical kiln, and the resulting lime consequently shows the 

 presence of a considerable amount of coal-ash. By burning the shells 

 in kilns with separate furnaces this can be avoided, giving a much im- 

 proved product. 



The following analyses were made * by L. P. Brown and J. S. H. Koiner 

 on the oyster-shell used in lime-burning at Baltimore, Md., and the 

 resulting lime. 



TABLE 32. 

 ANALYSES OF OYSTER-SHELLS AND OYSTER-SHELL LIME. 



* American Chemical Journal, vol. 11, p. 37, 1889. 



