Nature Books

IMPORTANCE OF RODENT GROUPS. As the serious character of the depredations by harmful rodents is recognized, State, Federal, and private expenditures for their control increase year by year. These depredations include not only the attacks by introduced rats and mice on food materials stored in granaries, warehouses, commercial establishments, docks, and private houses, but also, particularly in the... more...

The subject of inheritance is an immense one, and has been treated by many authors. One work alone, 'De l'Hérédité Naturelle,' by Dr. Prosper Lucas, runs to the length of 1562 pages. We must confine ourselves to certain points which have an important bearing on the general subject of variation, both with domestic and natural productions. It is obvious that a variation which is not... more...

PREFACE Mushrooms and their extensive and profitable culture should concern every one. For home consumption they are a healthful and grateful food, and for market, when successfully grown, they become a most profitable crop. We can have in America the best market in the world for fresh mushrooms; the demand for them is increasing, and the supply has always been inadequate. The price for them here is... more...

BIRD SONG. T SHOULD not be overlooked by the young observer that if he would learn to recognize at once any particular bird, he should make himself acquainted with the song and call notes of every bird around him. The identification, however, of the many feathered creatures with which we meet in our rambles has heretofore required so much patience, that, though a delight to the enthusiast, few have... more...

THE BLUEBIRD It is sure to be a bright March morning when you first hear the bluebird's note; and it is as if the milder influences up above had found a voice and let a word fall upon your ear, so tender is it and so prophetic, a hope tinged with a regret. There never was a happier or more devoted husband than the male bluebird. He is the gay champion and escort of the female at all times, and... more...

In his excellent taxonomic treatment of the tree squirrels of Mexico and Central America, Nelson (Proc. Washington Acad. Sci., 1:15-110, 2 pls., May 9, 1899) recognized three subspecies of red-bellied squirrels, Sciurus aureogaster aureogaster F. Cuvier, Sciurus aureogaster hypopyrrhus Wagler, and Sciurus aureogaster frumentor Nelson. In his lists of specimens examined, Nelson (op. cit.:42 and 44)... more...

Medicines may be administered to cattle in many ways. The channel and method of administration depend on whether a general or local effect is desired, the condition of the animal, and the nature of the medicine that is to be given. The easiest method, and therefore the most common, is to give ordinary remedies by the mouth with the food, with drink, or separately. There, are, however, some conditions... more...

CHAPTER 1. SUPPLY AND DEMAND. For years there has been a belief that the supply of fur-bearing animals would soon be inadequate to the demand. This belief is well founded and is apparent when the fact is known that the natural haunts and homes of the fur-producing animals are becoming less each year. The draining of swamps and marshes is destroying the homes and breeding places of muskrat and to a... more...

The Freedom of the Black-faced Ram n the top of Ringwaak Hill the black-faced ram stood motionless, looking off with mild, yellow eyes across the wooded level, across the scattered farmsteads of the settlement, and across the bright, retreating spirals of the distant river, to that streak of scarlet light on the horizon which indicated the beginning of sunrise. A few paces below him, half-hidden by a... more...

DEVELOPMENT OF THE DIGESTIVE CANAL OF THE AMERICAN ALLIGATOR By ALBERT M. REESE Professor of Zoology, West Virginia University In a previous paper () the writer described the general features in the development of the American Alligator; and in other papers special features were taken up in more detail.In the present paper the development of the enteron is described in detail, but the derivatives of... more...