Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, ...
Pandemic 2: Disease Mutation. Pandemic 2 is a disease game that allows more flexibility in creating a plague, including whether you want to be a bacteria, parasite or virus. Each disease has its own strengths and weaknesses. Note: See below game for instructions and tips. (And be sure to use hand sanitizer when youâre done playing.)
From time to time, there is a major change in the influenza virus, and no one is immune. When this happens, many people of all ages around the world become sick with the flu within a few months. This is called a pandemic. Pandemics have occurred in 1889, 1918, 1957 and 1968, and 2009 (H1N1).