BAIRD &WLOCK (LOM)ON) LTD. 



887-890 



Machines with double jet for low pressures, plates of light alloy, instead of brass 

 as used for high pressures. 



S7' With 5 c.c. plate, four tubeholders and twelve glass tubes . . each 



* With 10 c.c. plate, four tube holders and twelve glass tube* . . 

 |89 T With both 5 and 10 c.c. plater., eight tube holders and twenty-four glass tubes . . . 



90 T With 5 c.c., 10 c.c. and 25 c.c. plates, twelve tube holders, and thirty-six glass tubes 

 L9F Extra glass tubes for use with above . . 5 10 25 c.c. 



Price .. 1/6 1/10 2/3 per dozen. 



With very low pressures or in cases in which unusually rapid revolutions arc required it is advisable to 

 ivc the plates, more especially the larger ones, in alloy instead of brass. 



A Pressure Gauge is indispensable to the comfortable working of the apparatus in consequence of the 

 pressures. Diminished speed is often attributed to some fault in the apparatus, when it is in reality 

 lailure of pressures. 



Price of Gauge . . . . . . . . . . . . extra 13 6 



891 T Martin's Centrifuge, electrically driven. 



When, owing to low water pressure, or, as in large institutions, a iluctuation of pressure, the water-driven 

 ,:ilnnc is found unsuitable, the electrically-driven becomes the natural corollary, and the latter pattern of 



M.irtin, fitted with Dr. Sydney Rowland's clutch, has proved the greatest success. As in the water-driven 

 ittcrn. it l.as the upper centre mounted in a flexible holder, and is fitted with properly adjusted lubricators. 

 j- supplied with a suitable motor with a three-speed pulley, which enables reliable speeds of 2,000, 4,000, 

 .d (1,000 revolutions per minute to be steadily maintained. 



If the motor is not of sufficient power, it must be borne in mind that its initial speed becomes reduced 

 hou the larger pulleys are used. 



As the result of an extended experience it is recommended that the motor should not be of less power 

 an ; 1 1.P., and that a regulating switch of good construction should always be included in the outfit ; also that 

 lotor, switch, and centrifuge should be mounted on a base of either polished slate or teak wood, and that space 

 nild ;ilsn be left on the base for the fixing of a shaker if required. 



It is essential that the nature of the current should be stated, the periodicity and 

 oltage given. 



Martin's Centrifuge with Motor (J-H.P.) and Controlling Switch, mounted on polished 



slate base, with runners for adjustment of band. 



891 For no volt current, fitted with 10 c.c. brass plate . . each 



891- ditto ditto fitted with 25 c.c. brass plate .. 



'891 ' For 220 volt current, fitted with 10 c.c. brass plate .. 



; 891' ditto, ditto, fitted with 26 c.c. brass plate .. .. 



891 r Watkin's Switch .. extra 



519 



610 



7150 



11 20 



14 



1412 



1410 



15 2 



012 6 



