MAINE STATE COLLEGE 



colored and muddy. This latter condition is iisuully caused by too 

 little acid being used, and can be remedied by adding a little more 

 acid, shaking and whirling the bottle again. If tiie fat has curd 

 mixed with it the reading will be too high. 



In ordering the bottles described above, parties should be 

 particular to state that "cream bottle No. 3" is wanted. 



We would not advise getting larger than a twenty bottle machine, 

 and we would order two dozen graduated necks and four or five 

 dozen bases for a machine of that size. Dealers furnishing these 

 bottles should always fit them with the piece of rubber tubing to 

 connect the base with the neck. 



A very convenient way of handling the acid, is to have a glass 

 stoppered burette holding three or four charges, so fastened to a 

 shelf or stand that it can be filled by a glass stoppered syphon 

 passing into a large acid bottle above. 



This syphon is filled with acid by blowing into the bottle through 

 a small piece of rubber tubing connected with a piece of glass 

 tubing passing through the stopper which should fit the acid botth 

 perfectly. 



This piece of apparatus with a gallon bottle can be supplied by 

 glass dealers for about $4.00. 



For filling the bottles with hot water, we would recommend a 

 galvanized iron tank placed above the centrifugal machine, with a 

 faucet near the bottom to which is attached a piece of rubber 

 tubing three feet long with a glass nozzle which can be moved 

 around to each of the bottles where they stand in the machine. 



Note. The writer has designed a bottle for determining the 

 fat in butter made similar to No. 3, except the middle portion of 

 the neck is enlarged like a pipette. The small portions above and 

 below the enlargement are graduated the same as the milk bottles. 

 The range of readings is from 70 to 90 per cent, fat using 18 

 grams of butter. The eflSciency of this bottle has not yet been 

 tested. 



