134 



REPORTS ON INVESTIGATIONS AND PROJECTS. 



the wild animals. The proper inclosure of the tract places at the disposal of 

 the investigator, hill-slopes, mesa, and wash, freed from the disturbances 

 attendant upon free access of grazing animals and upon ranching operations. 

 Buildings. — Early in January plans were drawn and contracts let for the 

 construction of additions to the Laboratory by which its capacity was more 

 than doubled. With the completion of this construction work the Laboratory 

 now extends around three sides of a quadrangle 126 feet in length with a 

 short axis of 85 feet. Attached to the new arm of the building is a small glass 

 house for experimental purposes, the adjacent room of the building being 

 used as a work-room. The Laboratory now comprises a small work-room 



1=J u=i 



1=1 1=1 t=l t=J t=i fc=j 



1=) M. . h=* i=i__s: 



UJ uj-^ 



^^ 





12 



•^ ^ 1=1 



10 



t=l 1=1 



SCALE - 



5 10 20 30 feet 



14 



Key to Ground-Plan of Desert Laboratory. 



1. Morphological laboratory. 



2. Library. 



3. Photographic dark-room. 



4. Store-room and drawing-room. 



5. Main laboratory. 



6. Underground constant-temperature dark-room. 



7. Chemical laboratory. 



8. Physical laboratory. 



9. Physiological laboratory and oflBce. 



10. Work-room for greenhouse. 



11. Greenhouse. 



12. Covered porch with parapet wall. 



13. Soil thermographs. 



14. Cold frames for plants. 



for morphological work, a library and reading-room, a store-room and draft- 

 ing-room, a photographic dark-room, a large laboratory for geographic and 

 general work ; a chemical and preparation-room with hoods and fume drafts ; 

 a laboratory for physical experimentation with independent piers for delicate 

 instruments, a subterranean constant-temperature chamber, a large physio- 

 logical laboratory and office; a small work-room and bath-room, and an 

 experimental greenhouse. In addition one of the stone cross-walls has been 

 continued through the roof by a brick pier, capped with soapstone, furnish- 

 ing an elevated base for meteorological instruments, which is surrounded by 

 a platform reached by a stairway from the physical laboratory. Here is 

 installed the new type of evaporimeter designed by Dr. Livingston. 



