FIELD-GLASSES
A good binocular, preferably one which magnifies about six times, is a great aid to the amateur. The field of the glass, its illumination, ease of adjustment, and such points should be investigated before the purchase is made. A well-made glass with good lenses is probably the best in the long run, even though it be more expensive. Glasses should be handled carefully. They should have a good carrying-case, and should not be left lying in the sun nor exposed to the rain.