Note 1 — FIREDAMP TESTING STATION AT MARCHIENNE-AU-PONT.1
Reading edition
H. Schmerber, Genie Civil, xxix, No. 11.—From the Colliery Guardian.
[2] Reproduced in the Colliery Guardian, vol. lxxi, p. 317.
Reading edition
H. Schmerber, Genie Civil, xxix, No. 11.—From the Colliery Guardian.
[2] Reproduced in the Colliery Guardian, vol. lxxi, p. 317.