The older physicians in the Rocky Mountain regions have always insisted that there is a special type of fever indigenous to this section of the country. This fever or, as it appears to me, groups of fevers, has been given various names, but principally that of mountain fever. The group has simply been dismissed in recent years, although many good observers still hold that there is a type of fever which is neither malaria nor typhoid. It has been very generally held that exact laboratory methods would place these supposed specific fevers as aberrant types of one or the other of the two diseases.
A beginning has been made, however, in the description of the "Spotted Fever of the Rocky Mountains." This affection is now generally conceded a specific nature. So far as known it is very closely limited to narrow tracts of country and has a dreadful mortality rate.