what are rainfall recorder,campbell stokes sunshine recorder and earth thermometer?

Answer 1

To my knowledge, a "rainfall recorder" is simply a rain gauge and an "earth thermometer" is simply a thermometer. I.e., the terms refer to no special types. The Campbell-Stokes sunshine recorder does though:

http://www.piercecollege.com/offices/weather/duration_sunlight_recorder.html
http://en.wikipedia.org/wiki/Campbell-Stokes_recorder

a specific instrument for recording sunshine hours. As hinted at in the Wikipedia article (in its current state), direct sunshine makes a burn on the card (even very near sunrise/set, though not all the way thru - so it doesn't really have to be "strong") while diffuse generally does not, and a problem is variable cumulus cloudiness for which a cloud can cover the sun for awhile and little visible evidence show because one burn runs into the next. I know because I read about 3 or so years worth of these cards as a student researcher at University of Michigan and for awhile maintained the instrument.

Answer 2

I think you will find that they are instruments for measuring rainfall, sunshine and the earth temperature. What would you suggest they might be?

Answer 3

I have an entire life full of sunshine in the form of my husband and 6 children!! sandy :O)

Answer 4

this is the weather glossary