REPORT OF THE SECRETARY 35 



models and original objects the progress made in the mechanical and 

 electrical fields, in mineral resource industries, and in transportation 

 industries on land, water, and in the air. For some unexplained 

 reason in past years these collections have been augmented spas- 

 modically, all accessions recorded in any one year being concerned 

 with a single one or two of the divisions' activities. This year, how- 

 ever, the accessions recorded, while but a little higher numerically, 

 enhance the collections of every one of the branches in the divisions. 

 Thus in mineral technology the glass industry exhibit was brought 

 considerably closer to completion through the generosity of the Corn- 

 ing Glass Works. Two models of the most recent types of melting 

 furnaces were presented as well as typical examples of chemical, 

 industrial, and household oven glassware. The Cadillac Motor Co. 

 presented one of the first automobiles made by that company in 

 1903 and also one of its cars made in 1923, the latter being sectioned, 

 making visible car parts normally hidden from view. 



The Automatic Electric Co. donated a complete working unit of 

 the Strowger automatic telephone system. In this instance the ex- 

 hibition case is equipped with three telephones which the visitor may 

 operate and at the same time observe the functioning of the various 

 parts. To the section of aeronautics there were added the Fokker 

 T-2 monoplane, which flew in May, 1923, from New York to San 

 Francisco in a nonstop flight of less than 27 hours, and a helicopter 

 type of airplane with which Emile Berliner and his son made suc- 

 cessful flights at College Park, Md., in 1923. The water-craft col- 

 lections were increased first by the addition of a model of the 

 steamship Leviathan, transferred from the Alien Property Cus- 

 todian, and second through the courtesy of the Canadian Pacific 

 Kailway Co., Montreal, Canada, in lending a model of the steam- 

 ship Empress of Russia, one of the vessels of this company plying 

 between Vancouver and the Orient. 



As far as cooperative educational work is concerned, the lecture 

 work of S. S. Wyer, associate in mineral technology, was of greatest 

 importance. During the year he delivered 89 lectures on the subjects 

 of fuel and power resources before many of the schools, normal 

 schools, and colleges in Pennsylvania and before -several educational 

 groups outside of that State. 



Textiles, wood technology, organic chemistry, foods, and medi- 

 cine. — The collections under the supervision of the curator of tex- 

 tiles, which, besides textiles, embrace wood technology, foods, organic 

 chemistry, and medicine, were increased by many gifts and by trans- 

 fer of property from other Government bureaus, amounting to over 

 3,300 objects. The most important of these may be mentioned briefly. 



Several large series of industrial specimens illustrating every 

 branch of rubber manufacture, the manufacture of leather and 



