THE DINOSAURS 109 



particularly rich in examples of the great, horned Tri- 

 ceratops, while the Carnegie Museum, Pittsburgh, has 

 the best Diplodocus. The Field Columbian Museum and 

 the Universities of Wyoming and Colorado all have good 

 collections. 



The largest single bone of a Dinosaur is the thigh 

 bone of a Brontosaurus in the Field Columbian Museum, 

 this measuring 6 feet 8 inches in length. The height of 

 a complete hind leg in the American Museum of Natural 

 History is 10 feet, while a single claw measures 6 by 9 

 inches. The skeleton of Trkeratops restored in papier- 

 rnache for the Pan-American Exposition measured 25 

 feet from tip of nose to end of tail and was 10 feet 6 

 indies to the top of the back-bone over the hips, this being 

 the highest point. The head in the United States Na- 

 tional Museum used as a model is 5 feet 6 inches long 

 in a straight line and 4 f ee ^ 3 inches across the frill. 

 There is a skull in the Yale University Museum even 

 larger than this. 



Articles relating to Dinosaurs are mostly technical in 

 their nature and scattered through various scientific jour- 

 nals. The most accessible probably is " The Dinosaurs of 

 North America" by Professor O. C. Marsh, published as 

 part of the sixteenth annual report of the United States 

 Geological Survey. This contains many figures of the 

 skulls, bones, and entire skeletons of many Dinosaurs. 



