MAWSON & SWAN, 



37 



Apparatus, Hoffman's, on stand, 14/6 

 Do. same principle, i6/- 



Apparatus for the decomposition of water and delivery of the mixed 

 gases into a gas holder, consisting of a large glass jar 14 inches 

 long, 2 inches wide, with large iron electrodes, two binding 

 screws, caoutchouc cap, and gas delivery tube. (To be used with 

 weak solution of caustic potash.) 7/- 



Btmsen's Apparatus for the preparation of pure Oxyhydrogen Gas for 

 analytical purposes, 12 - 



Bunsen's Apparatus for Hydrogen alone, in a pure condition, i2/- 



SETS OF VOLTAIC APPARATUS. 



Xo. i. Consisting of 2 Bunsen's half-pint batteries, galvanometer, 

 4-in. horse-shoe electro-magnet, bar of iron and coil, single cell 

 electro-plating arrangement, copper solution for ditto, 12 yards 

 copper wire, electric bell, water decomposing apparatus, in box, 

 i los. 



No. 2. Consisting of small 10 cell Bunsen's battery, electric carbon 

 holder, single cell electrotype arrangement, copper solution for 

 ditto, 6-in. electro-magnet, water decomposing apparatus, upright 

 galvanometer, Ruhmkorff coil, 4 vacuum tubes, 20 yards of 

 wire, bar of iron with movable coils, 2 electric bells, commu- 

 tator, in box, 6. 



Xo. 3. Consisting of set of 20 Bunsen's pint cells in 2 trays, 

 automatic electric lamp, water decomposing apparatus, jar for 

 exploding mixed gases, large coil, set of 7 spectrum tubes, 

 box of 6 tubes, tourniquet, 8-in. horse-shoe magnet, astatic 

 galvanometer under glass shade, thermopile, dipping needle, 

 galvanometer (simple form), 2 model telegraphs, 220 yards 

 rubber covered wire, 2 electric bells, 2 pushes, 20 yards thick 

 wire, in box, 20. 



13 and 15, Mosley-street, Neivcastle-on-Tyne. 



