13.		Air circuit breakers / General Electric
14.		Air break circuit-breakers relays, etc / General Electric
15.		Air-break cicuit-breaker-type VA2 / Metropolitan - Vickers Electrical Company Limited
16.		Full wave reversing thy-mo-trol drive / GE-General Electric
17.		Investor / GE-General Electric
18.		How to calculate interrupting capacity / GE-General Electric
19.		The economics of light production / GE-General Electric
20.		The groundwork for proper equipment grounding : are your large portable machines properly grounded / GE-General Electric
21.		Voltage-regulating equipment characteristics as a guide to appication / GE-General Electric
22.		Surge diverters type MGP-R / GE-General Electric
23.		Electronic speed variator / GE-General Electric
24.		Materiel de serie / Siemens