BAIRD &TATLOCK (LONDON) LTD. 



2766-2770 2771-2772 2773 2775-2778 2779 



766 s Beckman's Apparatus for freezing point determinations, for small quantities of about 

 1.5 c.c. of liquid. Price complete 



767 8 Cooling vessel, with nickel plated cover and stirrer 

 768 3 Freezing tube with cork ring and air jacket 

 769 8 Stirrer for freezing tube with platinum ring in glass rod 

 770 s Normal Thermometer + 0.5 5 C. in fe 



771 Beckman's Apparatus for determination of the boiling point, with electrical heating 

 arrangement. The apparatus consists of a Dewar's vacuum flask on wooden sole, with 

 inner vessel and thermometer. Price without thermometer 



Thermometer extra i C. in T ^j, 

 773 Roth's Melting Point Apparatus 



775 s Melting Point Apparatus, Ubbelohde's (as described in Zeitschrift angew, Chemie, 

 1905, Heft 31), with thermometer, o to 100 C., in single degrees, metal cap, and glass 

 capsule 



776s Melting Point Apparatus as above, thermometer, o 150 C. in single degrees 

 777" Melting Point Apparatus 50250 C. 



Extra glass capsules for Nos. 2775-2777 . . . . . . . . each 



The apparatus consists of a thermometer fitted to a metal cap, at the other end of the cap is a second flange 

 irrying the small glass cups, these cups are 10 mm. long, with a 3 mm. hole, and are so fitted that the bulb of the 

 lermometer is placed exactly in the centre. 



The glass cups are filled with the substance to be tested ; should the substance be of the nature of paraffin or 

 resin, it should be melted into the cup, and left to set for twenty-four hours. Different cups should therefore 

 s used for each experiment if more than one are required during one period of twenty-four hours. 



When ready place the cap in position and insert apparatus in a beaker of water, which gently heat. The 

 citing point is the temperature at which the whole contents of the cup runs out. 



779 Melting Point Apparatus, with two side tubes with ground on caps. The melting 



tubes are inserted at the small side tubes, and rest on the glass ring 



780 Melting Point Apparatus. Jena glass bulb with sliding sleeve, carrying thermometer 



o 250 C. in i, ground to fit 



2780 



2 12 6 

 060 

 020 

 17 6 

 176 



110 

 250 

 036 



150 

 176 

 1 10 

 020 



030 

 076 



537 



