CHEMICALS AND STANDARD SOLUTIONS v 



NO. Estimation of the Volatile Fatty Acids 



69 76 Caustic soda apparatus. 



70 77 Polenske apparatus. 



71 78 Flask, CO 2 , 6 oz. 



71 79 Liebig's condenser for ditto. 



71 80 Porcelain basin, 6 in. diameter. 



74 8 1 Microscope slides, 3 x I in. 



74 82 Microscope cover glasses, f in. square, No. 2. 



75 83 Bottles, 4 oz. N.M., flat -stoppered. 



Determination of Refractive Index 



76 84 Zeiss' butyro-refractometer. 



THE ANALYSIS OF CHEESE 



83 85 Porcelain capsules, glazed all over. 



84 86 Flask, 250 c.c. with mark, stoppered. 



84 87 Separators, 500 c.c. cylindrical, with stopper and 

 stopcock. 



86 88 Hot-air bath, 7x7 in., on stand. 



86 89 Thermometer, engraved up to 110 C. 



86 90 Incubator, B. and T.'s form, slag wool lined, with 

 capsule regulating at 37 C., complete with thermo- 

 meter. 



86 91 Pair watch-glasses with binder. 



86 92 100 c.c. flask with mark. 



CHEMICALS AND STAND AED SOLUTIONS 



THE quantities detailed below are necessary for a large 

 laboratory. They may be reduced in proportion when only 

 a small outfit is required : 



5 Ib. acetic acid 100%. 



i Ib. acetone. 



4 oz. phenolphthalein indicator, 0.5% 



I litre sulphuric acid ^ solution. 



4 oz. potassium chromate indicator. 



I litre silver nitrate ~ solution. 



I w. qt. hydrochloric acid, pure. 



