BAIRD &TATLOCK. (LONDON) LTD. 



A5862' Special Osram Lamp. The lamp requires 1.5 ampere, and burns at 6 volts. A lamp 

 is provided with the electric illuminating apparatus 



The above lamps can be connected in series with a twenty-five candle power glow lamp on a lighting main, or 

 can be run off three accumulators. 



The lamps have, owing to their low consumption of current, at least 100 burning hours. 



It is desirable only to send the current through the lamps during charge and discharge, and a switch will 

 fore be required lor each accumulator. 



5863-5864 



5863 T New Electric Light Arrangement adapted to Polariscopes Nos. 5834 to 5837 . . extra 

 5864 1 New Electric Light Arrangement as above, with three cell accumulators in case with switch 



ACCESSORIES FOR SCHMIDT & HAENSCH POLARISCOPES. 



A NEW FORM OF OBSERVATION TUBE. 



5865 



It is not necessary to completely fill the tube before placing the glass cap on. The small bubble of enclosed 

 air collects at a, and in no way interferes with the reading. The tube must be filled at the narrow end, and when 

 the cap is on it should be inverted, so that the bubble may collect at the widened end. Such tubes are well adapted 

 when acid and volatile solutions such as ether, chloroform, alcohol, etc., have to be dealt with. 



5865' 



Polariscope Tube, complete, with brass screw caps at ends. 



50 94.7 100 189.4 200 220 400 



121- llj- 12/- 121- 12/- 12/- 131- 



076 



5 17 

 9 17 



600 millimetres long. 

 15/- each. 



5866 



5866 T Ordinary Observation Tubes, glass, mounted, with glass covers and rubber rings, brass 

 screw ends. 



1070 



