SKETCH OF CHARLES HENRY HITCHCOCK. 263 



sist principally of crystalline schists and marine igneous ejections. 

 The geology of New Hampshire is of peculiar importance, because the 

 situation of the State is such that a correct knowledge of its rocks 

 promotes the understanding of many obscure terranes in the adjacent 

 regions of Maine, Quebec, Vermont, and Massachusetts. Professor 

 Hitchcock's report of the survey may justly be styled his chief work. 

 The part best studied relates to the White Mountains and the 

 Ammonoosuc mining district. Connected with the survey was the 

 maintenance of a meteorological station throughout the year on the 

 summit of Mount Washington. Daily statements of the weather con- 

 ditions of this station during the winter of 1870-'71 were sent by 

 telegraph to the principal newspapers, and called out much interest — 

 before the United States Signal Service began its weather predictions. 

 The catalogue of Professor Hitchcock's publications comprises 

 more than one hundred and fifty titles of papers, reports, and books. 

 Perhaps the earliest thorough study represented among them was 

 that of the fossil footmarks. The first of the published papers on 

 this subject related to the tracks of animals in alluvial clay, and was 

 published in the American Journal of Science in 1855. For several 

 years after this he assisted his father in arranging the museum and 

 compiling tables for the Ichnology. He made a complete catalogue 

 descriptive of the more than twenty thousand individual impressions 

 preserved in the Appleton Cabinet, which was printed, with descrip- 

 tions of a few new species of footmarks, in the Supplement to the 

 Ichnology of Massachusetts, edited by him after the death of his 

 father in 1865. Although circumstances have prevented him from 

 paying much attention to ichnology in later years, he has prepared 

 several papers on the subject, the most important of which was one 

 on the Recent Progress of Ichnology, which was read before the 

 Boston Society of Natural History about twelve years ago. In it 

 the ichnites were carefully catalogued anew and classified in the 

 light of our knowledge of the numerous dinosaurs of the West; and 

 the results of some studies of the slabs exhumed at Wethersfield, 

 Connecticut, are well known. The list of the Connecticut footmarks 

 was increased from one hundred and nineteen in the Ichnology to 

 one hundred and seventy; and facts were cited to show that the 

 Grallator, the three-toed animal most allied to birds, possessed a 

 caudal appendage of a reptilian nature. The Trias of New Jersey 

 had been found to illustrate new features in the Otozoum, whose 

 tracks are often ornithic in aspect. A comparison of the features of 

 the Triassic skeletons described by Marsh from Connecticut (Anchi- 

 saurus) shows that the creatures were rather allied to the Plesiornis 

 than to the Anomcepus of the Ichnology, because of the great size of 

 the fore feet. Notes upon footmarks have been gathered also from 



