The National Guard of the Commonwealth is a necessity, and in a State like ours, with large numbers of illiterate and unprincipled men concentrated in certain localities, many of whom are foreigners, and imbued with the spirit of foreign communism, which is spreading in this country, the Guard must occasionally be called on as a posse to assist in enforcing the law; but it never should be called on until all other means are tried and exhausted. It has become too common to call on the Governor for troops, in ease of a mob, and the experience of the summer of 1877, demonstrates that in any community where the civil authorities and the citizens wish the law enforced, and act together harmoniously and vigorously, order may be maintained and mobs dispersed without the intervention of the military. At Philadelphia, large and angry mobs were dispersed by the police, which, if allowed to have been together for a day or two, would have become so strong, as to defy the ordinary authorities, and the result would have been riot and destruction. It was the same at Harrisburg, and also at Scranton, except at the latter place the city council refused to cooperate with the mayor and citizens, but notwithstanding this disadvantage, the wisdom of the measures of the mayor was vindicated at the first collision with the mob. It is but just to the people of Pittsburgh to say that the above places had the example of the latter place before them, and had learned the danger of temporizing or in any way sympathizing with anything like a mob, however just they may believe their original demands to be. In conclusion your committee adopt the following clause of the Governor's message, which fully coincides with their views, viz: