10 BULLETIN 1065, U. S. DEPARTMENT OF AGRICULTURE. 



3. Replace kettle filled with the distilled water and covered with 

 the slicker plate, omitting the standard weight, on scoop bracket of 

 balance without spilling water or disturbing weights previously set,. 

 release the arrest or damper, and let the pointer on balance come 

 to rest. 



4. If when the pointer has ceased oscillating it indicates an exact 

 balance, the capacity of the kettle is correct and this test is satis- 

 factorily completed. 



5. If the pointer comes to rest at any other position than the 

 center of the graduated arc. or center of balance, place the tolerance 





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Fig. 7. — Apparatus required for determining the accuracy of the quart-sized kettle. The 

 standard weight shown on top of the glass slicker plate over the test kettle is equal 

 in weight (1,098.08 grams) to 1 quart of water at 20° C. (68° F.). 



weight (1 gram) on the light side of the balance. If the toler- 

 ance weight is sufficient to swing the pointer to or across the center 

 mark, the error in kettle capacity is within the allowable tolerance 

 and the kettle may be used. But should the tolerance weight be 

 insufficient to swing the pointer to the center of its arc, or bring 

 the scale to balance, the error in the kettle capacity exceeds the 

 allowable tolerance and the kettle should not be used in making 

 official tests. 



To insure a correct test it is of course essential that the balance 

 used in making the test be sufficiently sensitive to indicate a change 

 in the pointer or beam reading when the tolerance weight is added 

 to or taken from either arm of the loaded balance. 



