Chemical News and Journal of Industrial Science, Tomy 103-104Chemical news office., 1911 |
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Strona 5
... allowed to stand in the dark for thirty minutes . The carbon tetra- chloride solution and the oil to be tested should be pre- viously dried by use of a few sticks of fused calcium chloride . At the end of thirty minutes about 100 cc ...
... allowed to stand in the dark for thirty minutes . The carbon tetra- chloride solution and the oil to be tested should be pre- viously dried by use of a few sticks of fused calcium chloride . At the end of thirty minutes about 100 cc ...
Strona 12
... allowed to proceed too quickly , the tem- perature does not exceed 70 ° , and the reagents are used in the proportion of 160 grms . of pure nitric acid , 100 grms . of crystallised acetic acid , and 290 grms . of acetic anhydride . The ...
... allowed to proceed too quickly , the tem- perature does not exceed 70 ° , and the reagents are used in the proportion of 160 grms . of pure nitric acid , 100 grms . of crystallised acetic acid , and 290 grms . of acetic anhydride . The ...
Strona 21
... allowed to compensate for abnormally weak ones , and a failure of one in six is allowed . Mantles which pass the above test are tested photo- metrically . Three are burnt for 100 hours on their proper burners , and are then removed to ...
... allowed to compensate for abnormally weak ones , and a failure of one in six is allowed . Mantles which pass the above test are tested photo- metrically . Three are burnt for 100 hours on their proper burners , and are then removed to ...
Strona 29
... allowed to cool . Half as much concentrated ammonium hydroxide is added as there is solution , and it is allowed to stand over night . The precipitate is collected on a filter , washed with 3 per cent ammonia water , dried in oven , and ...
... allowed to cool . Half as much concentrated ammonium hydroxide is added as there is solution , and it is allowed to stand over night . The precipitate is collected on a filter , washed with 3 per cent ammonia water , dried in oven , and ...
Strona 30
... allowed to dry in oven at 95 ° for one minute , and then weighed . The metallic cobalt is calculated as CoO , in which form it is present in the enamel . The Determination of Boric Anhydride in Enamel . The boron is determined in a ...
... allowed to dry in oven at 95 ° for one minute , and then weighed . The metallic cobalt is calculated as CoO , in which form it is present in the enamel . The Determination of Boric Anhydride in Enamel . The boron is determined in a ...
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