

BAIRD &TM1OCK. (LONDON) LTD. 



706 708 



|)6 T Berkefeld Laboratory and Experimental Filters. 



709 



''7 T Small Exhaust Pump, as in Fig. 696, for any of above niters . . each 066 



'8 S Dr. Houston's Pressure Filter, with Pasteur-Chamberland porous candle fitted into nickel- 

 plated brass vessel, capacity i litre, with pressure gauge, stopcock, hand force pump, and 

 rubber tube connections, to work up to a pressure of three atmospheres each 450 



' 9 s Dr. Houston's Pressure Filter, small size, for filtering toxins, with Pasteur-Chamberland 

 porous candle, 6 by J in., fitted into nickel-plated brass vessel, to hold 100 cubic centi- 

 , metres, with pressure gauge, stopcock, and force pump, and rubber connections, to 

 work up to a pressure of three atmospheres . . . . . . . . each 3 5 



CHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS 



143 



