MILK-SOLIDS. 



23 



A specimen of rich town-fed milk yielded in four experi- 

 ments — 



MILK. 



I. 5.000 grammes gave 



II. 5.004 



III. 5.000 



IV. 5.006 " 



Or in percentage — 



MILK. 



100 grammes gave 



and tlie mean, 



MILK-SOLIDS. 



0.7035 grammes. 

 0.705 



0.7025 " 

 0.705 " 



MILK-SOLIDS. 



14.07 grammes. 



14.09 



14.05 " 



14.08 



14.07 " 



These are not exceptionally carefully done, and only 

 illustrate the degree of accuracy which is attainable by the 

 most ordinary care. 



In conclusion, it remains to add, that such results are not 

 to be expected if the residues be weighed before the expiration 

 of the prescribed time — viz., the three hours — and that the 

 water in the bath must be kept boiling vigorously the whole 

 time. By prolonging the drying for a second period of three 

 hours, no sensible diminution takes place in the milk-solids. 



The employment of plaster of paris or sand (both of which 

 have been recommended for the purpose of rendering milk 

 residues porous), is to be avoided. When only five cubic cen- 

 timetres of milk are taken, as has been recommended in this 

 chapter, it is likewise unnecessary to stir up the milk during 

 the evaporation and drying. 



