80 FIELD MUSEUM OF NATURAL HISTORY 
{Scsamnm orientale) as eaten in Siam; and Klowlow Niew, a 
thin cake made of starchy meal from a Siamese tuberous 
root; exact source at present unknown. 
Cases 39 and 40. — Upper portion. A series of varnish, in- 
cense and medicinal gums from various countries. Lower por- 
tion. Pharmaceutical collection of various gums; showing 
fracture, guttation and other physical characters necessary 
to their proper understanding. 
Case 41.— Lower portion. Various rubbers from different 
species and plant families. These gums will be found in dupli- 
cate in the families to which they belong. 
Case 42. — Lower portion. Various gums, especially Chicle 
(Achras sapota) from which the greater part of the commer- 
cial chewing gums are made. (See also case No. 492.) 
The Chocolate Family (Stefculiacecu) , 
Case 43. — A life-size reproduction of the flowering and 
fruiting trunk, and a branch of the chocolate tree (Theo- 
broma cacao) of South America. Note the enlarged model 
of a sterculiaceous flower with its peculiar organization for 
cross fertilization; also the reproduction of an opened fresh 
chocolate pod and the arrangement of the seeds. Chocolate 
Fruits and Beans, chocolate nibs, shells (Cocoa), butter, and 
confection. Note the Swizzle sticks {Myrodia turbinata) used 
by the natives in preparing chocolate as a beverage; also native 
forms of prepared chocolate. 
The Silk-Cotton Family {Bonibacacece) , 
Case 44. — Right half. Note the seed and bast fibers yielded 
by species of this family; and the characteristic pod of Adan- 
sonia digitata. Observe the Natural Oakum, the inner bark 
of the South American Ochroma lagopus; this substance can 
be used as oakum, for caulking ships, without any treatment. 
Note the silky coma of the seeds of various species of Erioden- 
dron and Ceiba useful as stuffing for upholstery. 
The Madder Family {Rubiacecc). 
(See also Case 496.) 
Cases 45 and 46. — The coffees of the world. A large series 
of typical coffee {Coffea arabica) from the various coffee 
