Electrical novelties : the ultra vacuum electrodes, X-ray tubes and stands, the multiple spark interrupter, spark lamp to produce violet rays, spark regulator for coil, electric heaters, X-ray plates (1903)
Swett & Lewis Company, Boston · Boston : Swett & Lewis Company · leaf 3
^ P cr*- P CD 5 CD PP Pd. P- p O oq POPCD p 1:^ 2^ ^cT ^ p - <ri- CD CD P i-i >—P cr p CD P CD p^p p >t ^ p Pu l-i- ~i c-t- o c^ O p- O Pj :r: o ^ t^p -^ p ^ p ^ 2. CD CO e_i. P CC p o p^ <^ &r CD o<! CD P- cc c^ EI f=^ ^ p O . c-t- ^ S- p ^. p o a. P 111 I & o *■a. ^ 8. a s… … BULLETIN THIRTY-TWO Electrical Novelties The Ultra Vacuum Electrodes X-Ray Tubes and Stands The Multiple Spark Interrupter Spark Lamp to Produce Violet Rays Spark Regulator for Coil Electric Heaters X-Ray Plates Swett & Lew^is Company Eighteen Boylston Street, Boston, Massachusetts Terms Prices…
Electric apparatus and appliances · X-rays · Electrical Equipment and Supplies
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