228 



BENJ. PIKE S, JR., DESCRIPTIVE CATALOGUE. 



Fig. 243. 



Croton water, 



i milk and f water, 



i milk and ^ water, 



milk and water, 



Pure Orange Co. milk, 



w 



20 



40 



GO 



80 



100 



Directions for using the In- 

 strument. Fill the tin tube, 

 which accompanies the in- 

 strument, with the milk to 

 be tested at a temperature 

 of about 60 degrees, and sus- 

 pend the lactometer in the 

 milk, and it' the milk is 

 proof, the instrument will 

 sink to the degree marked 

 100 on the scale, or P, show- 

 ing that the milk is at par ; 

 but if the milk has been 

 adulterated with water, or 

 lias been taken from cows 

 that have been fed on slops 

 from breweries, and kept 

 confined in stables i;i warm 

 weather, the instrument 

 will, in all such cases, sink 

 below par, and show the 

 per centage of adulteration, 

 which, in some instances, 

 will be 25 per cent, below 

 par; but if the milk is supe- 

 rior, the instrument will 

 rise above P, and show the 

 per centage above par, 

 which, in some instances, 

 will be 10 per cent. Each 

 division 011 the scale is 5 per 

 cent. 



Any person can test the 

 correctness of the lactometer 

 by mixing water with pure 

 milk, and note the per cent- 

 age of water which they 

 use, and suspend the instru- 

 ment in the mixture, and it 

 will give the proportion of 

 water added. 



To farmers the instrument 

 has proved to be very valu- 

 able, as a ready means of 

 testing the relative quality 

 of their cows, by inspecting 

 their milk, and also showing 

 the effects produced by a 

 change of the animals' food, 

 as its quality will change 

 the density of the milk. 



Price, $1.00. 



