. Chemical testing of milk and cream . Fig. 7.—A dipper made entirely of glass and holding cubic centi-meters for measuring acid in the Babcock test. the use of cork stoppers is not permissible, as cork is rapidlyattacked by the acid. Owing to the property of sulphuricacid of absorbing water from the air and thus dilutingitself, it can not be kept in open containers. Sulphuric acid is an extremely corrosive liquid, whichattacks the skin, the clothing, wood, and most of the com-. Fig. 8.—A 2-bottle hand tester. mon metals. Should the acid be spilled on the clothing,it should be immediately
. Chemical testing of milk and cream . Fig. 7.—A dipper made entirely of glass and holding cubic centi-meters for measuring acid in the Babcock test. the use of cork stoppers is not permissible, as cork is rapidlyattacked by the acid. Owing to the property of sulphuricacid of absorbing water from the air and thus dilutingitself, it can not be kept in open containers. Sulphuric acid is an extremely corrosive liquid, whichattacks the skin, the clothing, wood, and most of the com-. Fig. 8.—A 2-bottle hand tester. mon metals. Should the acid be spilled on the clothing,it should be immediately washed off with plenty of water,and ammonia water applied; this in turn must also bewashed off. Unless the acid is washed off immediatelyafter contact with the skin, severe burns will result. Acidspilled on the table or floor may be neutralized with wash-ing soda or other alkali. Lead is the only common metal 15037°—16 2 10
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