304 Field Museum of Natural History — Reports, Vol. IV. 



the beautiful Cattleya orchid displaying family characteristics; a bundle 

 of Betel leaves to accompany the exposition of betel chewing; a large 

 branch of Connarus in full fruit and leaf; a tuber of the Oriental Yam; a 

 full size plant of the common, roadside, Milkweed in full leaf, flower, and 

 fruit; a branch of the Persimmon in full, ripe fruit; a large sprout of the 

 edible Bamboo as sold in the markets of China and Java; a leafy, fruit- 

 ing branch of the famed Mangosteen of Java, with two fruits in section 

 showing the edible pulp ; a natural size fruit of the Guava and a section 

 showing the seed characters ; and a leafy twig bearing a pair of full ripe 

 fruits of the Osage Orange. The Curator of Botany has conceived, and 

 the Section of Modeling cleverly worked out, a unique method of placing 

 before the public such microscopic plants as the germs of disease and 

 other low orders of vegetable life. In this the microscope itself has been 

 eliminated from the installations, its magnified field only being shown 

 in the form of reproductions distinctly portraying the objects that it is 

 desirable to display. In this manner the following plants, invisible 

 to the unaided eye, have been prepared and placed on exhibition: 



A field showing graphically how bacteria multiply. 



Forms of Bacteria: 



Rod-like {Bacterium, Bacillus, Pseudomonas, Vibrio) 

 Globular {Coccus, Streptococcus, Staphylococcus, Sarcina) 

 Corkscrew-like {Spirosoma, Microspira, Spirillum, Spirochcete) 

 Thread-like {Streptothrix, Chladothrix, Leptothrix, Gallionella) 

 Various shapes {Spirophyllum, Zodglcea, Actinomyces, Chondromyces) 



The formation of spores in Bacteria. 



Milk bacteria {Bacillus, Streptococcus) 



Nitrifying bacteria {Nitrosmonas, Nitrobacter, Clostridium) 



Germs of Cholera (Microspira comma) 



Pneumonia {Micrococcus pneumonicB) 



Tuberculosis {Bacterium tuberculosis) 



Syphilis {Spirochcete pallida) 



Typhoid {Bacillus typhosus) 



Diphtheria {Bacterium diphtheritidis) 



Splenic fever {Bacterium anthracis) 



Epidemic Meningitis {Menigococcus) 



The cultivation of Bacteria illustrating both tube and plate cultures 

 of several species. 



In these preparations the diseased tissue is represented in color on 

 the field, and the germs, reproduced in glass, are placed, in 

 situ, in the tissue. In this manner there have also been placed on 

 exhibition a number of ''fields" showing diatoms in colony and 

 individual growths as well as an exemplification of their life 



