BAIRD &L TATLOCK. (LONDON) LTD. 



j _ 



4197-4199 



Benzol and Naphtha Thermometers, best English make. 



It is well known that with commercial benzols, distilling at the same uniform rates, different thermometers 

 of admitted accuracy do not indicate the same quantity of fluid distilled. This result, which may give rise to 

 serious inaccuracy in returning trade certificates, is mainly due to differences in the dimensions in the ther- 

 mometers, either in the bulb, the bore or the length of stem. 



We may perhaps be allowed to remind users of the exact position in \vhich the thermometer should be placed : 

 A 200 c.c. retort should be used, the thermometer inserted in the tubulure so that the distance between the 

 bottom of the retort and the bottom of the bulb is f inch. The 70 mark on the thermometer should then be 

 clear of the cork in the tubulure. One degree Cent, should be deducted or added for each inch on the barometer 

 below or above 30 inches. 



4197 s Benzole Thermometer, 14^ in. long, divided and figured on the stem from about 70 to 

 130 Centigrade. 



A. In fifths of a degree . . . . . . . . . . . . ..017 



B. In tenths of a degree . . . . . . . . . . . . ..12 



4198 s Toluol Thermometer, 14^ in. long, divided and figured on the stem from about 100 to 

 165 Centigrade. 



A. In fifths of a degree . . . . . . . . . . . . ..017 



B. In tenths of a degree . . . . . . . . . . . . ..12 



4199 s Naphtha Thermometer, 14$ inches, engraved on stem, 90 to 200 Centigrade, in half 



degrees . . . . . . . . . . . . . . . . 17 



Other ranges of temperature quoted for on receipt of particulars. 



4204 



8 



4201 4202 4203 



4201 Tiles for Comparing Colour, white glazed on both sides. 



246 

 4d. 6d. 8d. I/- 



3/9 5/6 7/- ll/- 



4202 Tiles, Royal Berlin Porcelain, oblong, twelve depressions, size 4^ by 3^ in. . . 



4203 Tiles, Royal Berlin Porcelain, biscuit, for arsenic testing, size 4 by -z\ in. 



4204 Tiles, Royal Berlin Porcelain, oblong, with hole, size 8 by 6 in. , white glazed one side 



4205 Palettes, white stoneware, glazed both sides, 9 by 6 in., with thumb-hole 



12 in. square 

 2/- each. 

 23/- per doz. 



each 





 

 

 



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CROSS STRET HATTOTST GARDEN, E-C 



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