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 inherited throws no light on the derivation... 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) assigned certain specimens from "mountains near... more...

CHAPTER I. "Bless me, I do believe I have been asleep!" said a squirrel, one fine morning in early spring, when the delicious warmth of the sun had reached him in his winter retreat, and roused the lazy little fellow from a two months' nap. The truth is, that he and his family had fallen asleep at the first setting in of the cold weather, and had passed the dismal winter in a state of profound repose, except, that, during a warm day or two in... more...

The naturalists of yesterday and the naturalists of to-day. — The study of animals, plants, rocks, and of natural objects generally, was formerly called “natural history”; but this term is tending to disappear from our vocabulary and to give place to the term “natural sciences.” What is the reason of this change, and to what does it correspond? for it is rare for a word to be modified in so short a time... more...

FOREWORD "And in the lion or the frog—In all the life of moor or fen—In ass and peacock, stork and dog,He read similitudes of men." More and more science is being taught in a new way. More and more men are beginning to discard the lumber of the brain's workshop to get at real facts, real conclusions. Laboratories, experiments, tables, classifications are all very vital and all very necessary but sometimes their net result is only to... more...

THE HARE. I suppose you have all seen a Hare, and perhaps many of you have helped to eat one. The Hare is a very timid animal, running away on the least alarm; but, poor fellow, he is too often caught by the dogs and killed, notwithstanding his swift running. It is rather difficult to tame Hares, but there is a very amusing account of three, named Puss, Tiney, and Bess, written by the poet Cowper, who kept them for some time, and one day you... more...

SQUIRRELS Walking through the early October woods one day, I came upon a place where the ground was thickly strewn with very large unopened chestnut burrs. On examination I found that every burr had been cut square off with about an inch of the stem adhering, and not one had been left on the tree. It was not accident, then, but design. Whose design? A squirrel’s. The fruit was the finest I had ever seen in the woods, and some wise squirrel... 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 in which medicines administered in this way... more...

Our aim is to bring up to date the list of kinds of bats actually known from Barro Colorado Island, Panamá. In 1952 Samuel T. Dickenson, Marguerite Schultz, George P. Young, and E. Raymond Hall spent the first 17 days of April (except Mrs. Schultz who left on April 8) on Barro Colorado Island. On eight evenings a silk net, 30 feet long and 7 feet high with a ¾-inch mesh, was stretched in an open place to intercept bats. On the first... more...

Some of the Pleistocene mammals from San Josecito Cave, near Aramberri, Nuevo León, México, collected by field parties of the California Institute of Technology under the direction of the late Professor Chester Stock, have been reported previously (see Furlong, 1943; Cushing, 1945; Stock, 1950; Hooper, 1952; Findley, 1953; Stock, 1953; Handley, 1955; Jackway, 1958). In 1950, Professor Stock loaned a portion of the San Josecito... more...