The building and decorative stones of Maryland, containing an account of their properties and distribution (1898)
Merrill, George P. (George Perkins), 1854-1929, Mathews, Edward Bennett, b. 1869 · Baltimore, Johns Hopkins press · leaf 216
ence not ascertained. o.,14 The specific gravity of these rocks indicates that the weight percubic foot of the stone is l.j-t to 165 pounds. These figures seem to Comparison of Experiments on American and Foreign Building- Stonesto Determine their Relative Streng-th and Durability. Amer. .lour.… … Vic. l.-SA\DSTO.\K IJlAlMtY. KM M ITSIill.r.. FltKllKlUGK GOUNTY.
Stone · Building stones
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