(318) 
7029-7036. A series of specimens representing the former use of cotton fiber in the 
making of electric light carbons. 
7029. Long staple cotton.—A superior variety of cotton, consisting of the hairs 
from the seeds of one or more species of Gossypium (Malvaceae—Mallow 
Family). Native of tropical America and cultivated for its fiber. 
7030. Cotton squirt mixture.—A liquid with which the cotton is treated to prepare 
it for carbonizing. 
7031. Coil fiber.—The cotton fiber coiled, ready for shaping for the lamp. 
7032. Shaped fiber.—The cotton fiber in shape to go in the lamp. 
7033. Untreated carbon film.—The carbonized fiber before the final treatment. 
7034. Treated carbon film.—The film properly mounted for enclosing in the glass 
bulb. 
7935. 
7036. Finished cotton carbon incandescent lamp. 
7037-7054 represent the modern Tungsten lamp, which has entirely replaced those 
in which wood carbons were used. Same donors. 
7055. Pacury guazu charcoal——From Platonia insignis Mart. (Guttiferae— 
Gamboge Family). Native of tropical America. From Paraguay. 
7056. Guavira guazu charcoal.—From Campomanesia crenata Berg. (Myrtaceae— 
Myrtle Family). Native of tropical America. From Paraguay. 
7057. Araza charcoal—From the wood of the guava, Psidium guajava. (Same 
family). Same locality. 
7058. Arrijan charcoal.—From Blepharocalyx cuspidatus Berg. (Same family). 
Same locality. 
7059. Ybapanu charcoal.—From Eugenia cauliflora Mig. (Same family). Same 
locality. 
7060. Yba hay charcoal.—From F£. edulis B. & H. Same locality. 
7061. Yba Paroity charcoal.—From E£. Michelii Lam. Same locality. 
7062. Guaviyu charcoal——From EF. pungens Berg. Same locality. 
7063. Sapiranguy charcoal—From a species of Tabernaemontana (Apocynaceae 
—Dogbane Family). Native of tropical America. From Paraguay. 
7064. Guayabi hu.—From Patagonula americana LL. (Boraginaceae—Borage 
Family). Native of tropical America. From Paraguay. 
7065. Apaterebi hu charcoal—From Cordia alliodora Cham. (Same family). 
Same locality. 
7066. Taruma guazu charcoal.—From Vitex montevidensis Cham. (Verbenaceae— 
Verbena Family). Native of tropical America. From Paraguay. 
7067. Itepacho crispo charcoal. Charcoal from Tabebuia flavescens B. & H. 
Native of Paraguay. 
7068. Urandey mi charcoal—From Astronium Urundeuva Engl. (Carduaceae— 
Thistle Family). Native of tropical America. From Paraguay. 
7069. Brazilian Indian tinder.—A tinder used by the Brazilian Indians in making 
fire by friction with wooden implements. Acquired by Weiss & Schmidon 
the upper Rio Negro, Brazil. 
