MAWSON & SWAN, 



The Silvertown Firing Cell, a powerful form of the Leclanche 



Battery, in ebonite case, i5/- 

 The Naval Firing Cell, for firing Torpedoes, c., 

 ^18 IQS. 



Further particulars on application. 



Sinews Batteries. Two zinc plates, with one of 

 platinised silver between, the exciting liquid 

 diluted sulphuric acid, i to 7. 

 To keep these batteries in good order the zinc plates 

 should be amalgamated frequently. 



Very best finish (Fig. 94), 6;-, i2/-, 17 6, 

 and 24,- each. 



Ordinary form, square earthenware cell, half- 

 pints, 4/- ; pints, 5/6 ; quarts, 8/-. Set 

 of six, pint size, in tray, 35/-. 



A A Frc - 94- 



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



