This page needs to be proofread.
111
quired size, but to place a small bulb, the diameter of which is properly estimated, over the refractory button contained in the globe. This arrangement is illustrated in Fig. 28.
The globe L has in this case a large neck n, allowing
 | An image should appear at this position in the text. To use the entire page scan as a placeholder, edit this page and replace "{{missing image}}" with "{{raw image|Experiments with alternate currents of high potential and high frequency (Tesla).djvu/129}}". Otherwise, if you are able to provide the image then please do so. For guidance, see Wikisource:Image guidelines and Help:Adding images. |  |
Fig. 28.—Lamp with Auxiliary Bulb for Confining the Action to the Centre.
the small bulb b to slip through. Otherwise the construction is the same as shown in Fig. 18, for example. The small bulb is conveniently supported upon the stem s, car-
