Portfolio Tag: 1890

Hot Wire Voltometer 1890

The instrument makes measurements of voltage equally well on both AC and DC supplies. Its accuracy is independent of ambient temperature. This type of voltmeter was invented by Major Cardew in 1883. He was the first electrical adviser to the Board of Trade and devised the first set of Electricity Regulations. He established the Board…
Read more

Doulton Candle Type Ceramic Water Filter 1890

A typical domestic water filter of the late Victorian period to remove harmful bacteria, such as those causing typhoid and cholera, from drinking water. Used mainly in country districts where no public water supply was available. The small inner container is fitted with five porous unglazed porcelain filter candles through which the impure water passes…
Read more