

MAWSON & SWAN, 



47 



WIRE, 



Specially prepared for Electric purposes, insulation perfect, and conduc- 

 tivity of copper guaranteed 90 per cent, and upwards. 



For Cotton-covered Wire, seep. 21. These wires, however, should 

 only be used where no damp exists. 



Caoutchouc Insulated Wire : best tinned copper covered with India- 

 rubber, and over that cotton, variously coloured for distinction 

 in fitting up a House ; it is very flexible, and for general bell- 

 work the most highly recommended. 



Copper Wire. Per 100 yards. Per mile. 



No. 39. 18 B. W. G. ... 176 ... ^13 15 o 



No. 38. 20 B. W. G. ... 15;- ... n o o 



No..37. 22 B. W. G. ... 9/6 ... 715 o 



The same diameters of Copper Wire, taped and waterproofed for outside work, at 



the same price. 



Gutta-Percha and Cotton-covered Wire. This is rather thinner than 

 the caoutchouc-covered, and though preferred by some, cannot 

 be so well recommended, owing to the perishing nature of gutta- 

 percha. Covered outside, green, red, white, blue, or black cotton. 



Per loo yards. Per 'mile. 



No. 700. 22 B. W. G. ... io- ... ;; 15 o 

 No. 705. 20 B. W. G. ... 15,- ... ii o o 



Gutta-Percha-covered Telegraph Wires. Nos. 22, 20, and 16, B. W. G. 

 copper, single, covered with gutta-percha, to Nos. 16, 14, 12, 

 n, io, 9, and 8 gauge; and No. 16, double covered, from 7 to 

 No. i gauge. Prices vary ; quotations on application. 



Silk-covered Wire Cord, for Pear Pushes, for bringing a contact from 

 mantel push to dining table, &c. 



Green, two-cord, best quality, 6d. per yard, doz. yards 5 6 

 Do. three-cord, do. Sd. do. do. 76 



Other colours to order. 



Batteries to work the Electric Bells ; the Leclanche' form is the one 

 most recommended for its constancy and the little attention 

 required. See page 16 for prices. 



The Battery Power advised for different requirements is as follows : 

 For a single bell, short distance, two No. i cells. 

 For three or four bells, three No. 2 cells. 

 For small house, four No. 2 cells. 

 For large house or hotel, six No. 2 or six No. 3 cells. 

 For mines, &c., varies according to length of circuit, c. 



13 and 15. Mos ley-street, Newcastle-on-Tyne. 



