28 BENJ. PIKE'S, JR., PRICE CATALOGUE. 



No. 



639 Fig. 463, Seebeck's thermo-electric circuit, $ 5.00 



640 Fig. 464, thermo-magnetic rectangle, $1.75 to 2.50 



641 Fig. 465, thermo-electric revolving rectangles, 6.00 



642 Fig. 466, flat ribbon coils, 100 feet, $4 to 8.00 



643 Fig. 567, flat wire coils, - - - $3 to 6.00 



MAGNETO-ELECTRIC MACHINES, 



FOR MEDICAL AND OTHER PURPOSES. 



644 Fig. 468, Pike's rotary magnetic machine, in 



case, - 14.00 



645 Fig. 469, Pike's vibrating magnetic machine, 



large size, - - 14.00 



646 Fig. 470, Pike's magnetic machine, vibrating 



from both poles, - - 15.00 



647 Fig. 471, Pike's new portable magnetic ma- 



chines with square batteries, the instrument 

 packed within the battery in neat mahogany 

 or rosewood cases, four sizes, $8, $10, $12, 

 and extra large, *;;. - 15.00 



648 Fig. 472 Pike's improved portable magnetic 



machine in polished mahogany case, large 



size, - >. . 10.00 



649 Fig. 472, ditto, in polished rosewood case, 10.50 



650 Fig. 472, ditto, small size, - 8.00 



651 Fig. 472, ditto, small size, in rosewood case, 8.50 



652 Fig. 473, insulated conductors with wires, 



per pair, >. V 0.50 



053 Fig. 473, ditto, with binding screws to con- 

 nect wires, - 1.00 



654 Fig. 474, metallic plate for the foot, &c., - 0.25 



655 Fig. 474, ditto, with binding screw to connect 



wires, - L.-,i*U; 0.50 



656 Fig. 475, brass hand conductors, per pair, - 0.50 



657 Fig. 475, ditto, with binding screws to con- 



nect wires, - .... i.oo 



