112 FIELD MUSEUM OF NATURAL HISTORY 
(Boswellia papyrifera), Myrrh (Balsamodendron myrrh) and 
Bdellium {Commiphora Hotai) incense gums of Biblical fame. 
Caraha {Protium carana)^ a South American gum used as a 
healing salve; Copal {Bursera excelsa) a Mexican varnish gum, 
and others. Observe the very sweetly odorous wood Linaloa 
{Bursera Dalpechiana) of Mexico. 
The Quassia Family {Simarubacece), 
Case 479. — A family of mostly bitter plants noted for their 
tonic effect upon the digestive tract. Note the fruits of the Tree 
of Heaven {Ailanthus glandulosus) ; the yellow wood Quassia 
{Picrasma excelsa) and drinking cups made of the same in 
which water becomes bitter the moment it is poured in them. 
The Spurge Family {Euphorbiacece), 
(See also Case 56.) 
Cases 480 and 481. — Note the various forms of Castor Oil 
from the tropical Castor Oil Bean {Ricinus communis) a cluster 
of which may be seen in the lower left corner of the case. Ob- 
serve the highly explosive fruits of the Sandbox Tree of South 
America {Hura crepitans) and the oil, soap and candles made 
from the Purging Nut {Jatropha curcas). 
Case 481. — Observe Cassava and Tapioca from the root of 
the tropic American Cassava {Manihot apii) and the long series 
of Para Rubber from the American Rubber Tree {Hevea brazil- 
iensis ) . 
The Soapwort Family {Sapindacece) , 
Case 482. — Note the peculiarities in the floral structure in this 
family as seen in the model of an enlarged flower of the Akee 
{Blighia sapida), and the peculiar form of the climbing stems of 
many species in this family. Note the Soap Berry {Sapindus 
divaricata) used in the tropics in lieu of soap, and Shellac depos- 
ited upon the stems of the Indian Schleichera trijuga (see also 
the bottom shelf of the next case 483). 
The Horsechestnut Family {Hip/ ocastanacem). 
Case 482. — Note the large fruits and nuts of the Buckeyes 
{Aesculus glabra and A. hippocastanum) , and the wood of Tochi- 
no-ki {A. turbinata) of Japan. 
