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slide-box
slide-box n.
Brit. 
/ˈslʌɪdbɒks/
, /ˈslʌɪdbɒks/U.S. /ˈslaɪdˌbɑks/
(a) (see quot. 1875); (b) a resistance box in which a slide-wire takes the place of a coil./ˈslaɪdˌbɑks/Π
1875 E. H. Knight Pract. Dict. Mech. Slide-box, a slide-valve chest.
1902 Encycl. Brit. XXVI. 501/1 In the rare cases in which it is necessary to employ a long slide-wire..the calibration is best effected by comparison with a standard, such as a Thomson-Varley slide-box.
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