84 INSECTS AM) DISEASE 



l)n)\vn and roof rats, the wood rat and the California ground squirrel) are 

 shown and the manner in whieh the disease is disseminated is illustrated by 

 a copy of a corner of a rat infested house in California. The original from 

 w liich this ^vas copied as well as many of the rats and squirrels were obtained 

 through the courtesy of the U. S. l^d)lic Health ser\ ice of Washington. 

 Preventive measures against the plague are illustrated by models of a farm 

 w ith buildings rat-proofed and of a ship at a dock ecpiipped with guards to 

 prevent the access of rats to the shore. 



In a window case are shown various stages of the common mosquito, 



Culex, as well as of Anopheles, the carrier of malaria and, 

 Mosquitoes Aedes, which is responsible for the spread of yellow fever. 

 ^" ^^ . In the same case are specimens of other insect carriers such 

 of Disease ^^ ^^^ ^^^' ^^^ bedbug and the louse. Small cases flanking 



the windows contain specimens of the Glossinas which trans- 

 mit sleeping sickness and the Nagana disease in Africa and of the ticks 

 which spread Texas fever of cattle and relapsing fever, African fever and 

 Rocky Mountain Spotted Fever of man. Nearby are shown maps indicating 

 the area affected by the principal tick fever in the United States and a model 

 of a dipping vat used in freeing animals from tick infestation. 



A series of models and diagrams is devoted to the life history of the 



Anopheles mosquito and its relation to malaria. A relief 

 , jL . . map of the State of Arkansas illustrates the coincidence 



between low swampy lands and the prevalence of malaria and 

 another shows the heavy incidence of malaria in the vicinity of marsh-lands 

 near Boston. A full size model and a small relief map indicate the type and 

 arrangement of drains used for lowering the water le\el and eliminating 

 mosquito breeding pools and diagrams illustrate the progress made in mos- 

 quito control in New Jersey and the financial return which has resulted. 

 Two tree trunks, one normal and the other infested with fungi as a 



result of mechanical injury illustrate the important fact 



^^ ^. that the normal plant or animal is able to resist disease 



Resistance , ., , , t . . . , ... 



and Disease ^^ hue an^^thmg which tends to lower \ital resistance may 



open the way for the invasion of pathogenic germs. 

 [See Guide Leaflet No. 33.) 



The collection of Aiidul)oniana, or objects relating to the life and works 



. , , , of John J. Audubon, presented to the IMuseum by his grand- 



Auduboniana , , ^ r • -nw i -r^, < i , • , 



daughters, Maria K. and Florence Audubon, occupies the 



stairway hall. It includes original sketches and paintings by Audubon and 

 his sons, illustrations in various stages from the Quadrupeds of North Amer- 

 ica, and some of the copper plates of the Birds of North America. The 

 most important piece is a large painting of a covey of "English" pheasants, 

 flushed by a dog recently presented by Miss ]\I. Eliza Audubon. Of more 

 personal interest is the gun carried by Audubon on many of his expeditions 

 and a fa\orite buckskin hunting coat. 



