402 IOWA DEPARTMENT OF AGRICULTURE. 



We find many creameries that are careless about their composite 

 sample milk and cream jars, allowing them to stand uncovered. They 

 should have a perfectly tight cover to prevent evaporation. The care 

 of composite samples is important and they should receive good care. 

 This is one of the places where the richness of the patrons' product is 

 determined and should receive the best of care, so the farmer may 

 get accurate returns. 



Cream should be tested after each delivery. It is the most satis- 

 factory, for the reason that the cream is usually in good condition to 

 test, and there is no chance for loss by evaporation. 



Tlie reading temperature of fat in a Babcock test should be 120 

 degrees F. When it is read at this temperature, it is understood that 

 we get accurate reading. 



In preparing cream samples for weighing into test bottles, the 

 samples should be heated to 100 degrees F. or until the cream is quite 

 fluid. Then pour from one cup to another until uniform. If milk 

 samples are heated, to mix the cream thoroughly through the milk, the 

 milk should be cooled to 70 degrees F. before measuring into the test 

 bottle. Unless this is done, you will not get accurate measurement. 

 Milk and acid should be at a temperature of about 70 degrees, when 

 mixed. 



For making cream tests, where 9 grams of cream are used, add 

 equal amounts of acid and mix well, and fill bottles at once to bottom 

 of neck with water at 120 degrees F. Then whirl the tester for five 

 minutes at as high rate of speed as bottles will stand. Then add 

 water at same temperature to bring fat within scale. Whirl two 

 minutes, keeping temperature at 120 degrees. The cream test should 

 be read from center of meniscus to bottom of fat column. 



The Chairman : The next man on the program is one who 

 needs no introduction. He is . a man who has been 

 with us ahvays to advance the movement of the dairy industry 

 in this state, and I have the pleasure of presenting to you Mr. 

 E. M. Wentworth, of State Center. 



Editor's Note: The convention here listened to Mr. Went- 

 worth's paper, which we regret we are unable to publish, 

 owing to same not being in our hands at time of going to press. 



The Chairman : This concludes our program for the even- 

 ing and we will stand adjourned until tomorrow morning at ii 

 o'clock. We have an exceedingly interesting progr^^m for 

 tomorrow and want everybody to stay that possibly can. 



