BAIRD &TATLOCK: (LONDON) LTD. 



GENERAL DESCRIPTION OF METHOD AND APPARATUS. 



The method consists in boiling the whole grain in a mineral oil having a flash-point much above the boiling point of water, 

 condensing the water which distils off, and collecting and measuring it in a suitable graduate. 



A single moisture determination can be made in twenty-five to thirty minutes, and with a standard six-compartment machim 

 an equal number of tests can be made in approximately the same time. 'By the use of three six-compartment machines, one 

 mln a" d a helper can readilv make two hundred tests in a day of eight hours, or an average of approximately two and a haH 

 mfnutes for each test. Making moisture determinations by this method does not reqmre a tramed chemist. The tests can be 

 made satisfactorily by any careful worker who is honest and able to follow simple instructions. 



A Two-Compartment Machine is also made. 



I NM RUBBER STOPPED 



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Fig 2. Sectional View, showing the various parts properly connected _for use. 



A. Distillation Flask in position, f in. above the wire gauze, 



B. Distillation Flask in wooden rack, used only during filling. 



Rules for Making Tests. 



Carefully weigh the desired quantity of the substance to be tested, and empty immediately into the special distillation flask, 

 to which add 150 cubic centimetres of oil and shake slightly so that the two become well mixed. Insert the thermometer, which 

 should be adjusted in the No. 5 rubber stopper, so that when the latter is firmly in place the mercury bulb of the thermometer 

 will be four-fifths immersed in the oil (see Fig. 3). If the mercury bulb of the thermometer is near the bottom of the flask the 

 percentage of moisture will be too low. 



Place the flask in its proper compartment, and by means of the No. 3 rubber stopper connect the side tube of the flask with 

 the thimble of the glass condenser tube, which extends down through the cold water tank, so that the moisture which is liberated 

 frcm the grain or other substance will be condensed an.d collected in the graduated cylinder beneath the tank. 



Cover the flask, then ignite the gas, adjusting the flame so that it will require about twenty minutes to reach the desired 

 temperature. When the desired temperature is reached, which varies with different grains, extinguish the flame quickly. As 

 soon as the water stops dropping from the condenser tube, which usually requires from four to six minutes, the test is complete. 



CROSS STREET HATTOTST GARDE1ST, E-C 



1032 



