The Removal of Stains
The Removal of StainsBleaching:
Bleaching powder is very useful in the removal of stains from white fabrics. Ink spots rubbed with lemon juice and dipped in bleaching solution fade away and leave on the cloth no trace of discoloration. Sometimes these stains can be removed by soaking in milk, and where this is possible, it is the better method.
Bleaching solution, however, while valuable in the removal of some stains, is unable to remove paint stains, because paints owe their color to mineral matter, and on this chlorine is powerless to act. Paint stains are best removed by the application of gasoline followed by soap and water.
Use of the Barometer
The Structure of the Ear
Methods of Heating Buildings
Matter and Energy
The Disadvantage of a Simple Cell
Danger of an Oversupply of Current
The Effect of the Rapidity of Motion on the Musical Tone Produced
Waste Work and Efficient Work
Wool and Silk Bleaching
How Sound is Produced