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STATE BOARD OP AGRICULTURE. 



the number of revolutions of the disc and with the hand machine, the 

 number of revolutions of the crank per stated time. 



Milk Pipette. — 



There are several styles of milk pipettes, the simplest being a glass 

 tube with an enlargement near the center. The pipette should hold 

 17.6 cc. when filled to the mark on the neck. See illustration 2, figure 

 e. At d the New 'Way automatic pipette is shown consisting of one 

 tube within another; the inner one measures an exact sample and the 

 outer catches the overflow. The Wagner automatic pipette is shown 

 at G and consists of an ordinary pipette enclosed at the top with a 

 pear shaped bulb, below which is a stop cock. The part resembling 

 an ordinary pipette takes the sample, the stop cock retains it and the 

 bulb receives the overflow. 



Acid Measure. — 



There are also several styles of acid measures, each being graduated 

 to hold 17.5 cc. of acid. See ill. 2, figs, a and &. 



a 



Illustration 2. 



The simplest graduated acid measure in use is shown at &, while a 

 represents an acid storage bottle and measure combined. 



