BAIRD &TATLOCK (LONDON) LTD. 



Mercury Air Pumps. 



3577 



3578 



3580 



3577 Mercury Air Pump, Greiner and Friedrich's, with patent stopcock. Capacity of bulb, 



250 cubic centimetres, with manometer mounted on stand with drawer for mercury, 

 with reservoir and indiarubber pressure-tubing as illustrated 



See page 673 for description. 



3578 Mercury Air Pump, large model, for physical and physiological laboratories, on polished 



mahogany stand, with raising and lowering arrangement. Capacity of bulb, 500 cubic 

 centimetres, with reservoir and indiarubber tubing as illustrated 



3579 Mercury Air Pump, smaller model. Capacity of bulb, 350 cubic centimetres, mounted 



on stand, with the raising and lowering arrangement, stand similar to Fig. 3578, with 

 reservoir and indiarubber tubing as illustrated 



3580 McLeod Vacuum Gauge. The apparatus consists of a glass mercury bulb, 500 cubic centi- 



metres capacity, with a tube on top of bulb graduated 0.2 to o.ooi cubic centimetres ; 

 alongside this is a branch tube graduated in millimetres. Mounted on wood stand with 

 mercury reservoir and ratchet to raise and lower. Complete as illustrated 





5 10 



12 

 9 15 



440 



CROSS STREET HATTCHSr GARDETST, E-C 



672 



