BAIRD &TXTLOCK (LONDON) LTD. 



SECTION No. 10. 



Refractometers for Oil, Butter, Beer, and Sugar 



Analysis, 



Fig. I (i full size) 



4944.4947 



Fig. 2 (Section) 



4944 1 Dipping Refractometer, Zeiss', in case, with attachable beaker and with a table for 

 the conversion of the scale readings into refractive indices 



The lower end of the refractometer is immersed in the middlemost of the five beakers of the front row. The 

 rectangular mirror fitted under the trough reflects the light of the bright sky through a glass plate upwards into 

 the beaker and through the fluid into the refractometer. The latter hangs by its hook H upon the wire frame T. 

 Observations are made from above by means of the ocular Oc. The border line of total reflection is achromatised 

 by turning the milled ring R. The micrometer screw z supplies one-tenth scale divisions. 



Accessories (Set A). 

 4945 T Auxiliary Prism 



4946 1 Heating Trough A 



4947 T Two Thermometers (see Nos. 4952-4953) 



4948 r Heating Spiral, Fig. 4972 . . 



4949 T Cistern A of the Water-pressure Regulator, Fig. 4973 



12 10 



12 

 1 10 

 136 

 3 1 

 070 



19 3 6 



ICHEMICAL AND SCIENTIFIC APPARATUS AND PURE CHEMICALS. 



895 



