The northern plain of india is also called the
plain

The Northern Plain of India is also called the Indo- Gangetic plain. It is located in the southern part of the Himalayan range. The plain is formed from the flood plains of three big river systems namely the Indus, the Ganga  and the Brahmaputra.

The soil  cover in the plain is rich and fertile, and water is found in plenty combined with a favorable climate for growing several major crops. It is one of the world's most intensely farmed areas and is thus very densely populated.

a maximum–minimum thermometer. the scales are fahrenheit on the inside of the u and celsius on the outside. the current temperature is 23 degrees celsius, the maximum recorded is 25, and the minimum is 15, both read from the base of the small markers in each arm of the u tube. the bulbs are hidden by a plastic housing.

six's thermometer is a registering thermometer which can record the maximum and minimum temperatures reached over a period of time, for example 24 hours. it is used to record the extremes of temperature at a location, for instance in meteorology and horticulture. it was invented by a british scientist james six, born in canterbury, in 1780; [1] the same basic design remains in use.

it is also commonly known as a maximum–minimum, minimum–maximum, maxima–minima or minima–maxima thermometer, of which it is the earliest practical design.

the thermometer indicates the current temperature, and the highest and lowest temperatures since last reset.