36 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1918. 



welcome therefore were some excellent examples of this type of fab- 

 ric, comprising broadcloth, beaver, zibeline, chinchilla, flannels, over- 

 coatings, and a strong corkscrew-weave fabric used for shoe tops. 

 Owing to the need of conserving wool for use in the manufacture of 

 military clothing, new types of fabrics for civilian use have been put 

 on the market by manufacturers. One of these reaching the museum, 

 " Honey cloth," is a cotton warp worsted having the weft threads 

 composed of one-fourth mohair and three-fourths wool. 



To the series of implements used in preparing and weaving textile 

 fibers were added an old flax breaker and two small looms of the 

 types employed in producing Gobelin and Beauvais tapestries, to- 

 gether with a repairing board used in mending such fabrics. Some 

 of the first embroidery machines brought to the United States from 

 Europe are doing war work by embroidering service insignia for the 

 Government. A contribution of 107 specimens of such official emblems 

 of the United States Army, the United States Navy, the Food Admin- 

 istration, and the Boy Scouts of America, on standard uniform fab- 

 rics, makes a popular exhibit. 



In emphasizing the importance of food conservation a large series 

 of foodstuffs received as gifts from manufacturers or as transfers 

 or loans of Government property enlarged the old section of foods 

 and permitted an exhibit along the line of the Food Administration. 

 Besides series of wheat substitutes, examples of the conservation of 

 surplus fruits and vegetables by dehydrating and by canning were 

 secured, and material to show the high food value of soy beans and 

 peanuts. An exhibit of 74 models of ordinary articles of diet, each 

 one representing a quantity of food sufficient to produce a heat value 

 of 100 calories, shows graphically the relative heat value of the vari- 

 ous articles in a manner easily comprehended by everyone. 



Hand samples of woods produced by 344 trees indigenous to North 

 America, carefully determined in the preparation of the Tenth Census 

 Keport as to value as fuel and for construction, reached the Museum 

 from the United States Naval Academy at Annapolis, and the New 

 York State College of Forestry contributed a collection of wood 

 specimens representing the more important species in use in the in- 

 dustries of New York State. Other additions to the section of wood 

 technology included log sections cut from trees felled in Smithsonian 

 and Seaton Parks in recently clearing the ground for the erection of 

 temporary buildings for the War Department ; an elaborate display 

 of " Korelock " doors ; a standard aeroplane propeller and an impeller 

 also of laminated wood construction ; specimens showing steps in the 

 manufacture of a baseball bat, of a wagon wheel, of an automobile 

 wheel, of a saw handle, of a billiard cue ; and various specimens of 

 California redwood. 



