This refers, not to the scientific, but to the popular study of our birds, chiefly in the field. We can learn many very interesting things by watching our birds, especially during the nesting season, and the habits and peculiarities of many are still but imperfectly known. One thing to be impressed upon the student at the start is the need of very careful observation before deciding upon the identity of a bird with which you are not perfectly familiar. A bird's colors appear to differ greatly when viewed in different lights, while in looking up in the tree tops, it is often impossible to see any color at all without the aid of a good field glass. By the way, we would advise everyone to own a good pair of these, for, besides being almost indispensable for bird study, they are equally valuable for use at the sea shore, in the mountains or at the theatre. [We have examined more than a hundred makes of field glasses to select the one best adapted to bird study, and at a moderate price. We found one that was far superior to any other at the same price, and was equal to most of those costing three times as much. It gives a very clear image, magnifies about four diameters and has a very large field of view. It comes in a silk-lined, leather case, with cord for suspending from the shoulder, and is of a convenient size for carrying in the pocket. We have made arrangements so that we can sell these for $5.00, postpaid (money refunded if they are not satisfactory after three days trial). Order from Chas. K. Eeed, Worcester, Mass.]

We should also advise everyone to keep a note book, apart from the Bird Guide. At the end of the season you can write neatly with ink on the top of the pages of the Guide, the dates of the earliest arrivals and latest departures of the birds that you have recorded. If you see a bird that you do not recognize, make the following notes, as completely as possible: - Length (approximately); any bright colors or patches; shape of bill, whether most like that of a finch, warbler, etc.; has it a median or superciliary line, eye ring, wing bars, or white in the tail; what are its notes or song; does it keep on or near the ground, or high up; are its actions quick or slow; upon what does it appear to be feeding; is it alone or with other birds, and what kinds; where was it seen, in dry woods, swamp, pasture, etc.; date that it was seen. With this data you can identify any bird, but usually you will need only to glance over the pictures in the Bird Guide to find the name of the bird you have seen.

I should advise anyone by all means to make a complete local list of all the birds that are found in their neighborhood, but of far greater value than the simple recording of the different species seen on each walk, will be the making a special study of one or more birds, even though they be common ones. While, of course, noting any peculiarities of any bird that you may see, select some particular one or ones and find out all you can about it. The following most necessary points are cited to aid the student in making observations: - Date of arrival and whether in large flocks, pairs or singly; where found most abundantly; upon what do they feed at the different seasons; what are their songs and calls at different seasons; when and where do they make their nests; of what are they made and by which bird or both; how long does it take, and when is the first and last egg laid; how long does it take them to hatch, and do both birds or only one incubate them; upon what are the young fed at different ages; how long do they remain in the nest, and do they return after once leaving; how long before they are able to feed themselves, and do they remain with their parents until they migrate. These and other notes that will suggest themselves, will furnish interesting and valuable instruction during your leisure time.

Topography Of A Bird