BAIRD &TATLOCK. (LONDON) LTD. 







'. 



4897 4906 



4897 s Milk Testing Centrifugal Apparatus, Lister & Babcock, improved form for hand power. 



4 6 8 10 16 20 bottle tester. 



350 3 10 3 15 400 500 5 15 each. 



Above prices include bottles, pipette, acid measure, acidimeter, and butter fat chart. 



Extra Glass Fittings for above. 



4898 s Ordinary Babcock Test Bottle .. .. .. .. each, 1/7; per doz. 



4899 s Lister's Ai Double Neck Bottle .. .. ,.2/8; 



4900 s Cream Bottles .. .. .. .. .. ,,1/7; 



4901 s Cream Bottles, new pattern .. .. .. ,,1/7; 



4902 s Separated Milk Bottles .. .. .. .. ,,1/7; 



4903 s Sulphuric Acid Measuring Flasks .. .. .. .. ,,1/7; 



4904 s Milk Pipette .. .. ,,1/7; 



4905 s Milk Pipette (half size) .. .. .. 1/1 ; 



4906 Apparatus, after Prof. Soxhlet and Henkel, for the estimation of acidity in milk 



DIRECTIONS. 



To 100 c.c. of milk is added 4 c.c. of a 2 per cent, solution of phenol phthalein in alcohol, and as much N/4 

 caustic soda added from the special burette (which automatically fills itself to the zero point) as will impart a 

 marked red colour to the milk. 



The number of c.c. added gives the degree of acidity. 



Milk which has become curdled through boiling shows from 5.5. to 6.5, and milk which has curdled at the 

 ordinary temperature from 15 to 16 of acidity. 



The estimation of acidity in milk, cream, etc., is of importance when the milk is accepted at the creameries ; 

 also in testing buttermilk for its applicability in the preparation of cheese rennet, for checking the acidity in the 

 preparation of butter from acidified cream, in testing milk for making Parmesan cheese, etc. 



Solutions Phenol phthalein too c.c., bottle, 1/9. Caustic soda N/4 per litre bottle, 3/8. 



4907 Basins, Royal Berlin Porcelain, shallow af in. diameter, capacity 45 c.c., glazed inside 



and outside for milk analysis, as recommended by Professor Stokes. See also Nos. 



1940-1941 . . . . . . . . . . . . each, 1/2 ; per doz. 12 6 



CROSS STREET HATTOTST GARDETST, E-C 



