114 REPORT OF THE 8ECRETARY. 



The exhibit followed, an far as circumstances would permit, the lines of the 

 permanent exhibition series of the Museum. Each division of the department was 

 represented, and in addition there was included a full-sized restoration of the skeleton 

 of the huge extinct American reptile Trkeratopg, prepared and exhibited conjointly 

 by the Museum and the United States Geological Survey. 



Division of Geology. — The display made by this division comprised three seeris, (1) 

 a collection of rocks from the Hawaiian Islands, (2) a series of native elements, (3) 

 a series of concretionary forms. The collection of Hawaiian rocks, which occupied 

 one case, consisted mainly of specimens obtained by the United States Exploring 

 Expedition in 1840, by Mr. A. B. Lyon in 1892, and Prof. C. H. Hitchcock in 1899. 

 The rocks of these islands are all of igneous character, except the limestones of the 

 coral reefs along the shores. 



The series of native elements comprised those sixteen, such as sulphur, arsenic, 

 gold, etc., which occur in an uncombined state in the earth's crust. The full series 

 was as follows: Carbon, sulphur, selenium, telurium, arsenic, antimony, bismuth, 

 gold, silver, copper, lead, mercury, platinum, iridosmine (iridium and osmium), and 

 iron. This collection was installed in a special case, and particular care was taken 

 with the details of mounting to emphasize its significance. Among the most inter- 

 esting objects included were a very perfect crystal of diamond from South Africa 

 (representing carbon) and a nugget of platinum from Russia weighing 4-14 grams. 



The series of concretionary forms included specimens of orbicular granites from 

 Rhode Island, Sweden, and Finland, and of septarian concretions of clay ironstone 

 from New York, Kansas, and Weymouth, England, and other locahties. These 

 occupied a wall case. 



Division of Mineralogy. —The exhibit of this division consisted of an extensive series 

 of ininerals, very carefully classified', arranged, and labeled to illustrate the methods 

 employed by the Museum when exhibiting large, systematic collections. Tlie series 

 comprised about 500 specimens and was accompanied by 47 group labels in addition 

 to individual labels for each specimen. It occupied four standard Museum "slope- 

 top" floor cases. 



Division of Strailgrapliic Paleontology— Section of Invertebrate Fossils. — This section 

 exhibited two series of invertebrate fossils, crinoids and cephalopods. 



The crinoids, or stone lilies, were represented by specimens of 94 genera, and the 

 cephalopods (cuttlefish, squids, etc.) by specimens of 146 genera. They were 

 accompanied by descriptive labels, the technical terms in which were explained by 

 a special series of specimens artificially colored to draw attention to the particular 

 parts referred to. The collection was installed in five standard Museum "door 

 screen" cases. 



Section ofVerlebrale Fonstls.— On account of the limited space, but few vertebrate fos- 

 sils could be exhibited. The exhibit consisted of a full-size restoration of the skel- 

 eton of the Tertiary American reptile, Triceraiop.v, mention of which has already been 

 made; a skeleton of a cretat'cous fossil toothed bird, Hesperornis; a restoration of the 

 skeleton of Zeiiglodon, an extinct whale-like mammal from the Eocene, and bones 

 and skulls of the mastodon, mannnoth, and titanotherium. 



In the case of Triceratops, a small model and painting showing the ])robabIe 

 external appearance of the animal were exhibited with the restoration of the skel- 

 eton, and a large oil painting representing the creature in its native fields was dis- 

 played on an adjacent wall. 



Dr. V.W . True, nprcsentative for the Institution and Museum on the (iovernment 

 board, was also chairman of the siM'cial committie on exhibits from the Outlying 

 Possessions of the I'nitc d States. Mr. W. V. Cox, chief special agent, was also sec- 

 retarv of the < ioveiiiment board. 



