INDEX 



Air Compressors, Description of . . 81 



Ai-ci'l.'iit* in Tunnels ..... H-, l.VJ 



After Construction ....... 273 



Chattanooga Tunnel ...... 276 



I Miring Construction ..... 266 



(Ji.-vi Tunnel ........ '^4 



Repairing of ......... 269 



Baltimore Belt Line Tunnel, Gen- 



eral l>fsrriptioii ........ 150 



Boston Subway, General Description . 187 



Busk Tunnel, General Description . . 119 



Cascade Tunnel 



t'nitt-r him-, Determination ol . 



Curvilinear Tunnels .. 



Rectilinear Tunn.-N ... 



Slmplon Tunnel 

 Chattanooga. Tunnel, Accident In 



129 





 13 



9 



276 

 276 



Boston Subway ........ 187 



Dimensions of ........ 17 



Form ..f ........... 15 



N.-u Vrk Rapid Transit Railway 



Tunnel .......... 195 



Croton Aqueduct Tunnel ...... 126 



Culverts ............ 75 



DrOtoi 



M:i.,.l 



Power 



Mountings for 

 Rotary 



20 



21.84 

 21 



.22 

 22, 102 



I ..-i i:i\. r (.:IH Tniini-l. General 



208 



Kiitr.tiirtw ..... ...... 77 



Kxcavniiiin : 



AuMrlnn method ....... 163 



Advantages and I >lad vantages Ml 



Ilaltiiii'Ti- ll.-lt Line Tunnel ... 161 



H.-lk'ian M.-HI,H| ........ 135 



\.U image* and Dlnadrantage* U2 



Rontnn Subway ........ 188 



Excavation : (rontlnueif) PAGE 



Busk Tunnel 120 



Cost of . . .300 



Division of Section 32 



English Method 156 



Advantages and Disadvantages 161 



Enlargement of Profile 34 



German Method 140 



Advantages and Disadvantages 149 



Headings 33 



Italian method 167 



Advantages and Disadvantages 173 



Mont Cenis Tunnel 89 



Rock, Methods of 85 



. Quicksand Method 174 



Siiiij.l. ui Tunnel 100 



Tunnels, open-cnt : 



Parallel Ixmgitudlnal Trenches 181 



Single Longitudinal Trenches . 180 



TrniiHverse Trenches .... 182 

 Excavators : 



Machines for Earth 19 



Machines for Rock 20 



Explosives : 



Dynamite 26 



Gunpowder 25 



Nature of ... \ ...... 29 



Nitroglycerine 26 



Storage of 27 



Use in Blasting 96 



Fmw ... 27 



Geological Survey* : 



Mi-llpxl and I'urp- so of 

 Slmplon Tnnnel . . . 

 Grnveholx Tunnel . 



3 



H 

 129 



IlnulliiK : 



ll.-1-i.in Method 140 



H\ \V:i\ ,.f Kntranren .VI 



i;\ \v.,\ ofShafU ...... M 



l>. llnlll..|| 6ft 



KliKlUli Method 161 



(ii-rman MethrNi 148 



Italian Method .... .170 



BOO 



