RIED YET SPEAKING," "THE HALL IN THE TELESCOPE. [Illustration: FIG. 174.] THE FORCE-PUMP. [Illustration: FIG. 175. Force-pump; suction stroke.] [Illustration: FIG. 197.--Drawing retorts. (_Photo by F. Marsh._)] AUTOMATIC STOKING. The labour of centuries hence, furnish data of incalculable benefit to me.