DESCRIPTIVE CATALOGUE. 337 



delivered to a grinding mill and there reduced to a meal. This meal is the finished 

 food, free — by reason of its having been subjected during- the manufacture to a com- 

 paratively high temperature — from moisture and all baeillic impurities, and showing, 

 both by analysis and actual feeding teste, a higher percentage oi flesh-producing 



ingredients than any other fodder. This product alone gives a value to the corn- 

 stalk that at once removes it from the list of waste products. The other product, 

 from the central pithy portions of the plant. i> separated in the same machine as the 

 above in the form of granules of varying sizes. This ] - an agglomeration of 



cellular tissue free from sap and other impurities. This gives a natural pure cellu- 

 lose, easily and cheaply produced from an inexhaustible supply. This cellulose 

 contain- the same elements that cotton or wood cellulose contains, but to a higher 

 degree oi perfection, as in a natural product there are no extraneous matters to be 

 eliminated. The application oi cellulose in the arts and manufactures has been lim- 

 ited to a few substances, such as paper, celluloid, etc. The newer uses are as yet 

 mostly in the experimental stage, but enough has already been demonstrated to 

 warrant the >tatement that this source of cellulose will make possible the practical 

 production of many articles that have heretofore been only laboratory experiment-. 

 That the held is large will be appreciated when it is stated that '200 practical 

 applications of cellulose have already been enumerated. Cellulose from this source, 

 by reason of its quantity and quality, broadens the held of application and places on 

 the raw cornstalk an incalculable value. 



The following applications of corn-pith cellulose have already been made and are 

 now m active use: Packing for battle ships, use in the manufacture of a floor cov- 

 ering superior to linoleum, paper pulp, mattresses, horse collars, viscose, nitrates. 

 insulation for refrigerator cars, steam pipe and « oiler covering, dry cells for electric 

 storage batteries, and Maiden's New Corn Product rattle food — the refuse and epi- 

 dermis. 



* Specimens. — Mus. U. S. Dept. Ag. Large series of maize products. 



Zebra plant. See Calathea zebrhia . 

 Ziggar (Turk. . Linum usitatissimum. 

 Zizania aquatica. 



Endogen. Graminecs. An annual aquatic grass. 



Common names. — Indian rice, wild rice, water rice, tuscarora rice, water oats, 

 reed. 

 This tall, erect, annual. 3 to 10 feet high, grows in shallow water along rivers and 

 lakes from Canada southward to Florida and westward to Texas. It grows very 

 rapidly in 1 to 8 feet of water, and matures its seeds in August or early in September- 

 This grass is abundant in the tide waters of the rivers of the Middle States, notably 

 in the Delaware below Philadelphia, where it is always designated as "the reeds."' 

 The stems are used by coopers for making the joints of barrels intended to hold 

 whisky or petroleum perfectly tight. This grass is the Manorrin of the Chippewa 

 Indians, who gather the grain for food. F. Lamson-Seribner.) 



Zostera marina. Geass TVeack. oe Sea TTeack. 



This is an aquatic or marine herb, belonging to the Xaiadacea. "They are sub- 

 merged fresh or salt water plants, found in most parts oi the world: they are of 

 little economic value" (Guide Lew Bins.). Two species of the genus are indigenous 

 to Britain but occur in other parts of the world, from Ireland south to the Cape of 

 Good Hope. Tasmania, and New Zealand. It is also found in the United States. 



Fsf.upo-firer. — The common sea wrack has leaves varying from 1 to several feet 

 in length, and rarely more than a quarter of an inch broad. These are commonly 

 used for packiug. and by upholsterers for stuffing mattresse- and cushions, being 

 sold for that purpose under the names of Flva marina or Alva marina. They contain 

 a small amount of iodine, and a considerable quantity of potash. ^A. Smith.) 

 12247— No. 9 22 



