What are an authors credentials?
@melo30

When using information for your research paper, you need to know if the author is a credible source.  Ask yourself, "Is the author an expert in this particular field of study? Does the article give any background information on the author? Does the author have advanced degrees in that subject area(e.d. PhD)?"

To find additional information on an author, you can look at biographical reference sources, which are books containing information about a person's life, work, and professional accomplishments. These sources can help you to determine the author's importance in a particular field. Examples of biographical sources are Who's Who in America and Contemporary Authors, both available in the reference section of most libraries

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.