Household Meters

Electricity Meters

Three types of electricity meters in common use in households:Standard meters, Variable rate meters, Prepayment meters, Smart meters.

Standard meter measures your electricity consumption in terms of kilowatt-hours, Variable meter ("economy 7" meter) gives two readings, one for daytime electricity usage, and one for night-time electricity usage. Prepayment meters usually accept tokens or cards that can be bought or topped up, respectively. A smart meter allows you to see the actual cost of the gas or electricity you use and provides information for each appliance.

Gas Meters

Gas meters either show numbers only or dials, There are two types of digital meter, digital meteric meter and digital imperial meter, recording the number of units of cubic meter or cubic feet respectively. Dial meter has four or five dials with each dial turns in the opposite direction to the one before it.

Water meters

water meter has only one dial with a sweep hand which measures water usage in gallons.

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Nightsoil men

In Victorian time, building were often put up before water and sewage pipes were laid down so a single tap or pump might have to serve hundreds of people. Toilet waste was carried away by 'nightsoil men'. Some seeped into the water supply and rivers became polluted by factory and human waste. In 1858, the Thames in London became so smelly that the year was known as 'the year of the Great Stink'!

The Indian Mutiny

British rulers were shaken to the core by the Indian Mutiny of 1857. The spark which lit the fuse of the rebellion was when cartridges were given to Indian troops which were coated in grease, made from cow or pig fat. These cartridges had to be prepared for firing by being bitten at one end. The cow is a sacred animal to the Hindus and the pig is regarded as unclean by Muslims, so no one was happy. Indian troops refused to bite the cartridges. Their British officers hanged a few. The troops rioted. They killed their officers, ransacked Delhi, and massacred British men, women and children. For a long time it looked as if the British might be defeated. The rebellion was about more than just biting cartridges. It was a revolt against taxation and the laws of the East India Company, which ruled India for Britain. After the mutiny, the British were a lot more careful about how they governed India. When the news of the mutiny reached England, crowds bayed for blood and Victoria was hor...

Bidmas, Bedmas, Bodmas, Pedmas And Christmas

This BBC GCSE Bitesize post says, BODMAS stands for 'brackets', 'other', 'division', 'multiplication', 'addition' and 'subtraction'. It's the order in which we carry out a calculation. But another article says, the order of operations in Maths called BIDMAS. BIDMAS stands for Brackets, Indices, Division and Multiplication, Addition and Subtraction. The difference is that the second substitute 'o' with 'i', and we can understand that teacher normally chooses easy way to explain whose pupils can understand, exponent or power or indices are out of reach of foundation students, so teachers uses 'other' instead. And in this article , 'o' actually stands for 'order', as far as my memory can go, my English teacher never teach me 'order' actually means 'Powers and Square Roots, etc.' In United States, the mnemonic fo Order of Operation is PEMDAS, because brackets are called pa...

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