Technology
The word "Figure" is used in two ways. It refers either to individual numbered Figures (1-21), or to any of the four pictures that make up each Plate, identified in the form "Fig. 2, Plate XXI". Figures 1-4 are always discussed as a group.
1 Master mechanic (days only), 1 Machinist, 1 Engine runner, 2 Firemen, 2 Oilers, 1 Electrician and helper, 1 Drill machinist and helper, 3 Blacksmiths and helpers, 1 Powderman,...
6. Part 6When the original lagging had become too much worn for further use, it was resurfaced with strips of 7/8 by 2½-in., clear, tongued and grooved, hard pine, placed vertically, whi...
3. Part 3This necessitated, of course, that the cross-passages between that in which the fan was placed and the mouths of the tunnels should be blocked tight. There was some difficulty i...
5. Part 5_Ditches, Floor and Foundations._--The first method of building the foundation was that shown by Fig. 13, _A_; no attempt was then made to build the ditch, or floor, the intenti...
2. Part 2+---------------------------------------------------+------------+ | | Number | | Blasting Notes: | of Sticks | | | | | All holes of whole round are cleaned and loaded | | | bef...
1. Part 1The word "Figure" is used in two ways. It refers either to individual numbered Figures (1-21), or to any of the four pictures that make up each Plate, identified in the form "Fi...
7. Part 7The desire to obtain a dry tunnel, and the methods adopted to secure it, were responsible in a great measure for the decision to build the arch in short lengths, as well as the...