624 EXHIBIT AT THE COTTON STATES EXPOSITION. 



The floor case on the right contains meteorites showing tbe general 

 character and composition of those bodies. Attention is called to the 

 large meteorite on the pedestal, weighing 746 pounds from Canyon Diablo, 

 Arizona, and to the several other meteoric irons in the case, from the 

 same locality. These irons are of interest because of the great size and 

 extent of the "fall," over 10 tons of them having been found in the region, 

 and also from the fact that they contain microscoj)ic diamonds. 



SYNOPSIS OF ARRANGEMENT. — COMPARATIVE SERIES. 



I. Chemical mineralogy. — Chemical composition; variation in com- 

 position ; relation of composition to form. 



II. Physical mineralogy. — Crystallography; compound crystals; iso- 

 morphism, Pleoniorphism. 



Pseudomorphs. — Characters depending upon light : luster, color, dia- 

 phaneity; characters depending upon cohesion: cleavage, fracture, 

 tenacity, hardness ; characters depending upon mass : heat, magnetism, 

 and electricity; specific gravity: fusibility, magnetism, and electricity. 



DEPARTMENT OF BOTANY. 



This exhibit occupied three sides of Alcove H, and consisted of a 

 collection of the woods and shrubs of Japan mounted in a very original 

 and beautiful manner by Japanese artists. v To each species was devoted 

 a polished panel, made of its own wood, upon which were painted the 

 leaves, flowers and fruit, while the panel was framed with its own bark. 



The collections belonging to this department are, for the most part, 

 not available for exhibition purposes, being chiefly dried specimens for 

 research work. The national herbarium contains a quarter of a million 

 mounted plants. 



DEPARTMENT OF MATERIA MEDICA. 



The exhibit of this department, Alcove H, consisted of a case illustrat- 

 ing the composition of a number of the principal mineral waters used 

 as beverages and for medicine. By the side of a bottle of the water, 

 as found in commerce, are placed a number of smaller bottles, which 

 contain the amount of each chemical substance found in the amount of 

 water shown in the first bottle. Here, also, is a case which illustrates 

 the composition of the human body by displaying in bottles the exact 

 quantity of each substance to be found in the body of a man of average 

 size (154 pounds), while in a parallel series are shown the quantities of 

 each element in the same man's body. 



DEPARTMENT OF PREHISTORIC ANTHROPOLOGY. 



This exhibit occupied Alcove I, and consisted of a small, carefully 

 selected collection of implements and objects used by man in prehistoric 

 times, the specimens being mostly American, 



