and Laboratory Methods. 



2263 



nature of exhibits. The outer hall may be doubled, forming two enclosing boxes 

 to the court. In the latter case there may be loss of light in the inner halls. 



SCIENCE MUSEUM— One Story. 



Of this style of building the Field Museum may be taken as a quite success- 

 ful illustration. The ground plan (Fig. 20) of the Chicago museum is cruciform, 

 made up of two main halls, crossing under a rotunda, and a number of smaller 

 tributary halls at right angles to the east and west main hall, an arrangement, 



Fig. 21. — Vertical Section of American Museum of Natural 

 History, New York. 



according to the thesis maintained here, generally objectionable ; in fact it may 

 be claimed that the single-story Science museum should be abandoned. 



The main arms of the cross in the Field museum are 09 feet wide, 69 feet 

 high, and respectively 300 and 501 feet long, with the central dome 126 feet high. 



Examples of interior sections which furnish some useful comparisons are 

 given in Figs. 21, 22, 23. Fig. 21 is a vertical section through the first member 

 of the American Museum of Natural History, New York; Fig. 22, the same 

 through the Academy of Sciences of Chicago; and Fig. 23, the same through the 

 Art Institute in Chicago, in which for scientific utility the superiority of the first 

 seems incontestable, though the second is conceived on similar lines. The dis- 



