356 Field Museum of Natural History — ■ Reports, Vol. III. 



ever, a Modeler's section has been equipped and placed in charge 

 of Dr. B. E. Dahlgren, a capable scientific artist, and the results 

 of his work in reproduction are finding places in the plant 

 families. The case devoted to the breadfruit family, illustrated 

 in this Report, clearly indicates the proposed plan of installa- 

 tion. In this case the material illustrates the family characters 

 and products as follows: A life-size reproduction of the end of a 

 leafy, flowering, and fruiting branch of the breadfruit (Artocarpus 

 incisa) shows the leaf- form and characters; the disposition and 

 characteristics of the flowers, and the immature and mature 

 fruit in exact relation; with this are two enlargements from 

 nature exemplifying the intimate structure and character of the 

 flowers, both male and female, the more delicate features of which 

 are reproduced in glass to insure stability and permanence in the 

 reproductions; in close association is a natural sized ripe fruit, shown 

 in section, to illustrate both the developed ovary and the peculiarities 

 of the fruit itself. These four reproductions together exemplify all 

 the botanical characters that distinguish the family and unite its 

 genera and species in intimate relationship. Another similar in- 

 stallation has been completed illustrating the chocolate family; in 

 this a chocolate tree (Theobroma cacao) is represented in full fruit and 

 leaf, an enlarged model depicts the peculiar flower in botanic detail ; 

 and a third the ripe fruit with its seeds (chocolate beans) invested in 

 their natural coating of mucilaginous tissue. Several other group 

 models now well under way will soon add deep and renewed interest 

 to cases already installed with products only. No Museum has ever 

 before attempted such comprehensive educational installation, and 

 the result in interesting the public in plant life is already being felt. 

 A rearrangement of the two easterly herbarium rooms became 

 necessary in order to better arrange the departmental library to 

 accommodate the increase of books obtained through the Rothrock 

 accession. The herbarium cases in the northeast room were removed 

 to the southeastern to replace the books therein. The entire walls of 

 the former room are now in book shelves the content of which makes 

 a creditable beginning of a botanical library. The subject, author, and 

 species card indices have been kept up to date and the accessibility 

 and utility of the library notably increased. The . herbarium work 

 has progressed satisfactorily during the year, though there is still a 

 large part of the Wahlstedt, Rothrock, and University of Chicago 

 herbaria awaiting the organization that will render the specimens an 

 integral part of the Museum herbarium. 



