ABSTRACTS OF TECHNICAL ARTICLES 1013 



Prince, M. B., see F. S. Goucher. 



QUARLES, D. A.^ 



A.I.E.E. Progress, Elec. Eng., 72, pp. 189-191, Mar., 1953. 



In his address before the A.I.E.E. Winter General Meeting, President Quarles 

 reviews some matters of current interest to the engineering profession, and to 

 members of the Institute in particular. 



Rae J. R.' 



Microwaves from Coast-to-Coast, Gen. Elec. Rev., 56, pp. 17-21, 

 Mar., 1953. 



Staxsel, F. R.' 



Transistor Equations, Electronics, 26, pp. 156-158, Mar., 1953 (Mon- 

 ograph 2066). 



Circuit gain and impedance characteristics are given in terms of transistor 

 parameters for grounded base, grounded emitter and grounded collector con- 

 figurations. Simphfying approximations are given where appropriate. 



Varxey, R. X.' 



Drift Velocity of Ions in Oxygen, Nitrogen, and Carbon Monoxide, 

 Phys. Rev., 89, pp. 708-711, Feb. 15, 1953 (Monograph 2081). 



The drift velocities of ions of the parent gas in oxygen, nitrogen, and carbon 

 monoxide have been measured as a function of field strength to pressure ratio 

 by techniques previously reported. Oxygen gave results similar to those in 

 the rare gases reported previously. A log-log plot of drift velocity against 

 £'/po in volts /(cm/mm Hg) starts with a slope near unity which gradually 

 decreases to one-half at high values of E/j^ . The mobiUty, extrapolated to 

 zero field and atmospheric pressure is 2.25 cm^ /volt-sec. Nitrogen and carbon 

 monoxide both show a novel characteristic; the drift velocity first rises with 

 jE'/po but reaches a maximum and actuall}' decreases, then finally resumes a 

 more normal rise with E/p^ as described for oxygen. It is beheved that a high 

 E/pQ the drift velocity is characteristic of N2 + ions and CO -|- ions, respec- 

 tively. At low fields the ion in nitrogen is believed to be N4^. In CO the ion 

 at low fields is beheved to be CO"^, with (00)2"^ being formed at intermediate 

 fields. The results are compHcated by an additional ion which appears in the 

 range of E/p^ from 95 to 250 and which has a higher speed than the other ion. 

 It is suspected of being C+. 



^ Bell Telephone Laboratories, Inc. 



2 American Telephone and Telegraph Company. 



5 Sandia Corporation. 



^ Washington University, formerly with Bell Telephone Laboratories. 



