ORDINARY liquids when not subject to strain are isotropic and appear dark when examined between crossed Nicols, whereas most crystals are anisotropic and light up the field. Several hundred pure ...

For joints in the bathroom that have mould stains, baking soda can also help. "Prepare a paste from water and baking soda and ...

It may also affect your finish. So, it’s best to mix a soap solution first. To do this, grab a bucket of warm water and add some washing-up liquid into the mix - about the same amount as you ...

Soap bubbles are hollow balls of soapy water ... Then add the dishwashing liquid to the solution, and have your child test the solution again. Does it form bubbles? Add the final ingredient ...