412 



NEGEETTI AND ZAMBEA, HOLBOEN VIADUCT, E.G., 



2377 



2378 



2379 



2380 



ELECTRICAL, 



GALVANIC, MAGNETIC, ELECTRO-MAGNETIC, AND 

 THERMO-ELECTRIC APPARATUS. 



FIG. 2377. FIG. 2393. 



FRICTIONAL ELECTRICITY. 



Cylinder Electrical Machines (Nairne's Model), on 



Mahogany Stands, with Japanned Conductors . 

 Ditto with Brass Conductor ..... 

 Ditto second size, 6-in. by 4-in. 



Ditto third size, 7 -in. by 5 -in 



Ditto fourth size, 8-in. by 6-in. (fig. 2377) 



Ditto fifth size, 10-in. by 8-in 



FIG. 2378. 



Each. 

 a. d. 



110 



Each. 

 s. d 



5 



10 



10 



2 



3 



5 



Cylinder" Electrical Machine, with double rubbers and 

 collecting forks, brass conductors, French polished 

 mahogany stand (fig. 2378) 



660 10 10 



Cylinder Electrical Machines, with a selection of the 

 most instructive and interesting experiments with 

 frictional electricity, Packed in a neat case . 4 4s. 5 5 10 10 



Plate Electrical Machines (Ramsden's arrangement, 

 1760) with Brass Conductor, mounted on polished 

 Mahogany Frames, and finished in a superior manner. 



Ditto 9-inch 



Ditto 9-inch 



Ditto 12-inch 



Ditto 12 inch, Plate Electrical Machine with Double 

 Receiving Forks, best make ..... 



Ditto 15 -inch with ditto 



Ditto 18-inch (fig. 2380) with ditto .... 



Ditto 24-inch ditto 



1 12 



3 3 



4 10 



5 10 



6 10 

 8 8 



11 11 



