he humming noise caused by the vibra- was hastily transformed into a stean chamber, steam being provided by the locomotive, and infected articles carried long distances to and from the car. It is greatly to the doctors’ credit that with such means they were able to check the ravages of the fever.… … WHITEHEAD’S ELECTRIC SWITCH. for destroying epidemic disease in detail, upon its first RIERA’S INSULATOR. appearance in our cities. These machines are the out- growth of a study of the epidemic of yellow fever at Fig. 1 represents a vertical and Fig. 2. horizontal see- examining the upper cut) of a…
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