BAIRD &TATLOCK (LONDON) LTD. 





3954 



3954 Stirring Apparatus, Witt's pattern, complete with water turbine, stands and clamps, 



but without indiarubber tubing .. .. .. .. .. .. ..15 



3955 



3955 T Simple Laboratory Shaker (as devised by Professor W. R. Dunstan and Mr. T. S. Dymond, 

 and used in the Research Laboratory of Pharmaceutical Society), for the extraction of 

 solids with li quids ; the desiccation of organic liquids with solid drying agents ; the 

 chemical action of liquids on substances not freely soluble ; the mechanical mixture of 

 liquids for the production of emulsions, etc. 



(See Nos. 908-913 for Water and other Motors to drive above.) 



The shaker consists of a wooden truck into which can be firmly 'fixed, by means of a sliding partition, a 

 bottle or other vessel of any size up to that of a Winchester quart. This truck is supported underneath near 

 the front by a rod which can move backwards and forwards on a pivot. At the back the truck is supported by 

 two supports hinged, one end of each being fixed to either side of the truck, the other end being firmly fitted in the 

 base board of the machine. The necessary to-and-fro motion is communicated to the truck in the usual manner by 

 means of a crank connected with a revolving wheel, and attached to the truck by an iron rod This rod can be 

 connected with the crank at different distances from the axle, so that the extent of the excursions made by the 

 truck may be varied. A cord from a water or other small motor passes over the wheel, which is grooved at 

 three distances from the centre so that the rate of action may be regulated. In order to avoid the necessity of 

 altering the length of the cord which passes from the motor to the wheel, the base board of the apparatus is 

 provided with slots and thumbscrews, by means of which it may be securely fixed to the bench at different 

 distances from the motor. For shaking liquids in large vessels, the extent of the excursion of the truck should 

 be greater and the rate of motion less rapid than when small vessels are employed. 



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CROSS STRET HATTCTH GARDETST, E-C 



748 



