986 



Voltaic Electricity. Section 7: Induction Currents. 



Xo. 62 704 



51 110. 1 : 8. 



62 705. 1 : 6. 



62 721. 1 : 8. 



51,110. Simple Wood Stand for holding X-Ray Tubes, Figure. Price without Tube 

 illustrated 0. 



62.704. Milliammeter for High Tension Currents; base-diameter approximately 120 mm; 

 for measuring the current flowing into the X-Eay Tube; Weston type instrument with 



range to 5 milliamperes, on serpentine base 3. Hi. o 



62.705. - - i d e m, with two ranges (to 5 and 50 milliamperes), Figure 4. :>. 



Fluorescent Screens coated with Barium platinocyanide, excellent in action, in wood frame. 

 The Barium platinocyanide Screens are covered with a slab of stout lead-baryta glass 

 which protects the observer from the action of the Bontgen Bays but allows the image 

 to appear without any change. 



List No. 62,706 62,707 62,708 62,709 62,710 62,711 



Size cm 9x12 13x18 18x24 24x30 30x40 40x50 



0.17.0 1.10.0 2.7.0 3.13.0 6.0.0 9.13.0 



If provided with handles and protecting sheets, the price of each screen is increased by 0. s. o. 

 The prices of all Fluorescent Screens are liable to change without notice owing to the fluctuations 

 in the price of platinum. 



Fluorescent Screens coated with Barium platinocyanide, very efficient, in wood frame, without 

 protective lead glass. 



List No. 62,712 62,713 62,714 62,715 62,716 62,717 



Size cm 9x12 13x18 18x24 24x30 30x40 40x50 



0.14.0 1.6.0 2.2.0 3.6.0 5.11.0 9.0.0 



Cryptoscopes, Figure, with Fluorescent Screen which can be 



List No. 62,718 62,719 62,720 

 Size of Fluorescent Screen cm ... 9x12 13x18 18x24 



(a) Without Lead Shielding Glass . 1. 4. 1. 17. 2. 15. 



(b) With Lead Shielding Glass ... 1. 7. 2. 1. 3. 0. 



withdrawn. 

 62,721 62,722 

 24x30 30X40 

 4. 1. 6. 16. 

 4. 8. 7. 5. 



- idem, without Fluorescent Screen 



List No. 62,724 62,725 62,726 62,727 62,728 



For Fluorescent Screen cm 9 X 12 13 X 18 18 X 24 24 x 30 30 X 40 



0. 10. 0. 11. 0. 13. 0. 16. 1. 5. 



By using the Cryptoscopes radioscopy can be carried on without darkening the room 



62,723 

 40x50 

 10. 5. 

 10. 18. 



62,729 



40 > .")() 

 1. 10. 



62.730. Cardboard with Strips of different Metals, for checking the penetrative power of X-Rays 0. in. o 



62.731. Apparatus for Demonstrating that the Air is Ionised by X-Rays. Price without X-Ray 



tube or electrometer, but with bellows 2. 0. 



The apparatus consists of a wood box (lined with sheet lead) which encloses one of the X-Ray tubes 

 NIIS. (32,687 62,691 or 62,697 62,699. The \-Kays issue out of an aperture placed opposite the anti- 

 cathode and discharge an electroscope opposite. If the electrometer is set up somewhat laterally ii ran 

 also be discharged if the ionised air is deflected on to it by the bellows. 



A suitable electrometer to use is liraun's. No. (iO.21 1 60,215, p. Sil.'t. or Kolhc's No. till. 1!M>. p. 8M:>. 

 It is advisable, however, to place a plate of large surface on the electrometer. 



(iL'.732. Plate for plariiig on the Kleet rometer ( Bnmn's or Kolbe's) 0. 2. 



See complete special list for further Accessories for Rontgen 

 Ray Investigations. This is sent on receipt of a card. 



CL i 



. 5635, 288. 





