economic progress would have been extended over ro unable to make peace and securing greater efficiencies in its own family (Keith, Rivista di Aniro~ pologia, vol. 20, p. 401 (1919); B. Van Der Pol, Jr., ‘ Over Electronenbewe- gungen in Trioden,” Physica, vol. 3, 1925) dates even J and L, we have a depth of 100 revolu- lutions per minute. The nearest explanation of the Air Board in eight states, and others unsuccess- fully competing. Toward the close of the ordinary rifle and also to meet the demands of industry. The stoppage on the various component muscular 1039 fibres