CONTENTS FOR JANUARY 



Cover, Mammoths from the Mural by Charles li. Knight 



Frontispiece, A Fossil Tree from Eed Deer Eiver, Alberta 4 



Photographed by Barnum Brown in 1915, at the time of its discovery and excavation. It is 

 now on exhibition in the American Mnseuin, with giant fossil dinosaurs of tlie same Cretaceous 

 formation 



The "Ostrich" Dinosaur and the "Tyrant" 



Dinosaur Hexry Fairfield Osborx o 



Methods and difficulties in the restoration of extinct animals from tlieir fossil remains 

 Illustrations from restorations suggested by the Author 



Travel Xotes in ^Yestern Venezuela Herbert J. Spixdex 15 



An account of the American Museum archaeological reconnaissance in northern South America 

 Illustrations from photographs by the Autlior 



The Flight of a ]\Ieteor Elihu Thomsox 25 



Explanation of an astronomical subject of great interest, accompanied by an account of some 

 of the meteorites in the American Museum of Natural History by Dr. Chester A. Reeds 

 Illustrations especially from photographs and specimens on exhibition in the American Museum 



Autumn Migrations of Butterflies Howard J. Shanxox 33 



With records of observations made on Long Island during August and September, 1916 

 Illustrations from original drawings made for the Jot'RXAL by the Author 



Eeproductions in Duotone of Winter Studies 41 



Scenes from the woods and fields of Massachusetts, with quotations from Thoreau's Journal, 

 Winter in Massachusetts. By Mary Cynthia Dickerson 



The Telephoto Lens in Cinematography Xormax McClixtock 57 



A new achievement in bird photography, with descriptions of aims and methods 



Illustrations from the Author's motion picture films, giving comparative results with regular 



lens and telephoto 



Gem Mining in the United States — Tourmaline and 



Turquoise L. P. Gratacap 65 



Illustrations by courtesy of the United States Geological Survey 



The Jack Eabbit in California Mary Cyxthia Dickersox 71 



Intimate observations on the development of instincts in this species during a period of three 



months 



Illustrated with photographs from life by the Author 



Museum Xotes 76 



M.\RY Cynthia Dickerson, Editor 



Subscriptions should be addressed to the American Museum Journal, 77th St. and 

 Central Park West, New York City. 



The Journal is sent free to all members of the American Museum. 



