45, CORNHILL, E.G., AND 122, EEGENT STREET, W., LONDON. 



427 



2488 



2489 



J I 



2492 

 2493 

 2494 



Cylinders, of Shellac, Sealing Wax, 



Sulphur or Yulcanifce for illustrating 



Resinous excitation . . . . 2 6 6 6 

 Apparatus for producing Lichenburg's 



Figures, consisting of a flat Resin 



cake, a bottle of Powdered Red Lead 



mixed with Powdered Sulphur, a 



square of Muslin Gauze ; in a box . 

 Cylindrical Glass Tubes, for exhibiting 



vitreous Electrical excitation . 

 Fur Rubber, or prepared Cat's Skin, 



for Electrical excitation 

 Fox Brush for ditto ditto . 

 Cylinders, Electrical . . 3s. 6d., 4s. 6d., 066 

 Circular Glass Plates, for Electrical 



Machines, cut and polished : 



12 6 



016 030 



10 



18 

 2 

 12 



Diameter 

 Price 



9-in. 



6s. 



12-in. 



12s. 



15-in. 



21s. 



18-in. 



30s. 



24-in. 



66s. 



2495 Circular Ebonite Plates : for Electrical Machines. 



Diameter 12-in. 15-in. 18-in. 24-in. 30-in. 36-in. 



Price . 16s, 22s. 30s. 46s. 66s. 86s. 



2496 Conductors for Electrical Machines, 



black japanned Tin or Zinc 3s. 6d. 



2497 Ditto, Brass .... from 



2498 Glass Jars, for coating, ;-pts. Is., pts. 



Is. 6d., qts. 2s., 3 pts 



2499 Glass Handles . . .Is. 6d., 



2500 Gutta Percha Handles .... 



2501 Glass Legs or Supports . Is. 6d., 



2502 Glass Rod, for Electrical apparatus, per Ib. 



2503 Brass Balls . . . 9d., Is., Is. 6d. 



2504 Ditto, with Collar and Wire, for Mount- 



ing up Leyden Jars . . . 2s. 



2505 Amalgam, per box 



2506 Brass Chain, per yard .... 



2507 Flexible Conducting Wire, per yard, 



very convenient 006 



2508 Strips of Gilt and Silvered Leather, to 



illuminate by the electric spark, per yard 020 



2509 BaUs of Ivory, Bone,Boxwood, and Ebony 010 020 



2510 Brass Clamps, for fixing apparatus to 



table 030 046 



2511 Strong Iron Clamps for Ditto . . 036 



2512 Patent Copper Wire Rope, solid Copper Rod, or Flat Copper 



Band, Lightning Conductors, with the point and all staples, 

 FIG. 2512. &c., complete for fixing (fig. 2512). For full description 



and prices, see pages 127 and 129. 



ESTIMATES GIVEN FOR FIXING OR REPAIRING LIGHTNING CONDUCTORS. 



