"Roentgen" induction coils and other X-ray apparatus (1904)
James G. Biddle Company · Philadelphia : James G. Biddle · leaf 38
James G. Biddle, 1114 Chestnut Street, Philadelphia. 33. ^torage Batteries. … Figure 19. Portable Battery Type M P. FOR use with the Roentgen Portable 9 Coil we have hadmade specially the light weight storage battery above illustra-ted. It has capacity of 50 ampere hours and is sufficiently power-ful to run the coil continuously for therapeutic work for about twentyhours.…
X-rays · Induction coils · Radiography
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