BAIRD &1XTLOCK (LONDON) LTD. 



5377 



5377 s Portable Batteries, fitted in polished hardwood case, with lid, leather handle, and 

 brass terminals. 



Portable Lithanode batteries are now universally used for traction and for actuating motors. Their lightness, 

 freedom from disintegration and capability of abnormally high rates of discharge render them eminently useful 

 in many directions. 



Their low internal resistance, constancy, and absence of local action make them unrivalled for medical and 

 laboratory purposes, specially for X-Ray work as now adopted in all the principal hospitals throughout the United 

 Kingdom and the Colonies. The large repeat orders from the War Office during Egyptian and South African 

 campaigns speak for their utility and practicability in the field. Practical results in wireless telegraphy, scientific 

 research, etc., have proved that they retain their efficiency for many months, without recharging, as illustrated. 



The illustration represents a 6-cell 30 A.H. battery fitted with terminals to each cell, so that 

 2, 4, 6, 8, 10, or 12 volts can be taken at will. 



STANDARD SIZES, WITH APPROXIMATE WEIGHTS PER CELL. 



No. of 

 Cells. 



14 AH. 



21 A.H. 



30 A.H. 



45 A.H. 



60 A.H. 



90 A.H. 



180 A.H. 



I 

 Size 



2 



17 6 



4iX2fX7 

 176 



110 



4iX3^X7 

 1 14 



150 



7iX3X7| 

 226 



1 10 



7*X3fX7 

 2 12 



1 16 



7iX4fX7j 

 330 



250 



7jx6x7* 

 416 



3 18 



Size 



3 

 Size 



4 



1 17 9 



4ix6fx7 

 280 



270 



4ix8|x 7 

 300 



300 



7iX7*X7j 

 3 17 6 



3 14 



7iX9iX7i 

 4 16 



4 10 



7ixxxfX7l 

 5 17 



5 17 



Size 



5 

 Size 



6 

 Size 



2 18 3 



3 13 



386 



4^x12x7 



460 



4j X 16 x 7 



4 15 



ixxxfX7 

 5 12 6 



5 18 



7Jxi5fX7 

 700 



740 



Approx. weight 

 per cell 3^ Ibs. 

 with acid 



51 Ibs. 



7 Ibs. 



10 Ibs. 



12 Ibs. 



21 Ibs. 



40 Ibs. 



The prices given include extra terminals, so that 2, 4, 6, 8, 10, or 12 volts can be taken at will, according 

 to the number of cells used. 



5378 



5378 s Induction Coil, for determinations of conductivity, as devised by Nernst. It consists 

 of a small coil with few windings, fitted with a light hammer made of an oscillating wire 

 carrying a soft iron core in the centre, adjusted to vibrate very rapidly. Price, mounted 

 on vulcanite base 



1 10 



(CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



