The farmer lives with the weather. Therefore he should understand it; and he should be able to follow the indications of the weather maps, and should be provided with good thermometers and barometers of his own.

It is important that the thermometer should indicate the temperature correctly, and for this one must rely on the maker. Most reliable instrument-makers place the firm name on their instruments as a guarantee of accuracy. When purchasing, it is therefore well to see that the instrument bears the name of the maker. A reliable thermometer of the ordinary pattern costs $1 to $3, depending on the size and style of the case. Probably the most satisfactory instrument for farm use is " Six's" pattern of self-registering maximum and minimum thermometers. This instrument is but little larger than the ordinary thermometer, and arranged with two scales, one of which shows the highest and the other the lowest temperature since the instrument was "set." To "set" the thermometer, the small steel index in the tube is pulled down to the end of the column by a magnet that accompanies the instrument. The current temperature is indicated by this instrument in the same way as by the ordinary thermometer. Thermometers that cost from 25 to 50 are usually inaccurate through a part of the scale.

The same rule as to maker should be observed in the purchase of an aneroid barometer, although there are probably fewer worthless barometers on the market than worthless thermometers. A good aneroid barometer costs $ 10 to $ 15, depending on the size and make. As these instruments depend for accuracy on the mechanical construction, the cheaper grades are usually unsatisfactory. A pocket aneroid barometer (about the size of a watch) costs about $12. These instruments are arranged to determine elevations as well as to give weather indications.

Mercurial barometers are more expensive, costing $ 25 to $ 40. As the mercury in the column of a mercurial barometer changes its length with changes of temperature just as the column of mercury does in a mercurial thermometer, it is necessary to correct the reading at each observation. Tables, giving the amount to be added or subtracted from the reading for each degree of temperature, should be secured when the instrument is purchased.

Thermometers should be exposed in the shade, and where there is a free circulation of air. Barometers should not be exposed to full sunshine for any great length of time. Any convenient place in the house will give proper exposure for barometers.