+--------------+-----------------+--------+-------------+ |NAME OF |QUALITY OF SOIL. |COST PER| METHOD OF | |TUNNELS. | |LIN. FT.| TUNNELING. | +--------------+-----------------+--------+-------------+ |Mt. Cenis |Granitic, |$273.73 |Drift. | |St. Gothard |... | 193.63 |Heading. | |Stammerich |Granitic, | 157.90 |English. | |Stalle |Broken schist, | 290.58 |Austrian. | |Bothenfels |Dolomite, | 115.64 |English. | |Dorremberg |Calcareous, | 86.08 |Belgian. | |Stafflach |Calcareous, | 91.69 |English. | |Ofen |Calcareous, | 93.19 |Austrian. | |Wartha |Grewack, | 87.95 |Austrian. | |Mertin |Grewack, | 87.55 |German. | |Schloss Matrei|Clay schist, | 94.25 |English. | |Trietbitte |Clay and sand, | 229.0 |German. | |Canaan |Clay-slate, | 69.50 |Wide heading.| |Church-Hill |Clay with shells,| 178.0 |... | |Bergen No. 1 |Trap rock, | 182.31 |... | +--------------+-----------------+--------+-------------+ SINGLE-TRACK TUNNELS. +--------------+--------------------+----------+-------------+ | NAME OF | QUALITY OF SOIL. | COST PER | METHOD OF | | TUNNELS. | | LIN. FT. | TUNNELING. | +--------------+--------------------+----------+-------------+ |Mt. Cenis |Gneiss, |$82.27 |Heading. | |Stalletti |Granite and quartz, | 62.75 |Austrian. | |Marein |Clay schist, | 64.36 |English. | |Welsberg |Gravel, |165.07 |Austrian. | |Sancina |Clay of 1st variety,|129.40 |Belgian. | |Starre |Clay of 2d variety, |191.61 |Belgian. | |Cristina |Clay of 3d variety, |307.42 |Italian. | |Burk |... | 83.90 |Wide heading.| |Brafford Ridge|... | 85.33 |Wide heading.| |Dunbeithe |Limestone, | 70.47 |Wide heading.| |Fergusson |Sandstone, | 37.46[16]|Wide heading.| |Port Henry |Limestone, | 80.00[17]|Wide heading.| |Points |Granite, | 72.00[16]|Wide heading.| +--------------+--------------------+----------+-------------+ [16] Are unlined. [17] Lined with timber.