TY  - JOUR
T1  - Directions for Inquiries Concerning Stones and Other Materiale for the Use of Building; together with a Suggestion for Retriving the Art of Hardning and Tempering Steel for Cutting Porphyre and Other Hard Marbles
JF  - Philosophical Transactions (1665-1678)
VL  - 8
SP  - 6010
EP  - 6015
PY  - 1753/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1673.0010
M3  - doi:10.1098/rstl.1673.0010
ER  -