

RAIRD &TATLOCK (LONDON) LTD. 



2236 2237 2238 2239 2240 2241 



2236 Condenser, improved form, two concentric glass balls forming water jacket 



2237 Condenser, inner spiral tube fused to outer tube. 



Size . . . . 8 10 12 



Price .. .. ..4/6 5/- 5/6 



16 



2238 Condenser, Inland Revenue pattern, all glass, with spiral worm fused into jacket, each 



NEW FORM CONDENSERS. 



The essential part of these condensers is a hollow glass screw fitting closely over a plain tube, thus forming 

 a spiral channel of about 120 cm. length through which the vapour is compelled to pass condensing on the wall 

 of the inside tube. The disadvantage of the common spiral condenser, the gushing of the liquefied vapour, is entire!)' 

 avoided as there remains still sufficient space between spiral and tube to allow the liquid to run straight down 

 without stopping the passage. 



2239 Condenser with inlet and outlet tubes fitted with corks 



2240 Condenser made entirely of glass 



2241 Condenser, similar in form to Cribb's condenser, but far more efficient 



2242 Condenser, double surface with spiral 



3 



7 



8 

 11 



/^ gst-jBF- ^ T 



/ T 



2243-2244 



2243 Condenser, Dr. Graham's, body 30 by i in., with side tubes, ordinary corks and adapter 



2244 Condenser, same as No. 2243, with indiarabber corks . . 



each 2 

 3 



14- CROSS STREET HATTON GARDETST E- C 



