98 EEPORT OF NATIONAL, MUSEUM, 1923. 



in the last annual report of work having been started on a model 

 visualizing the manufacture and use of manufactured gas. This 

 model was completed during the present year and placed on exhibi- 

 tion in the coal industries section where it has received very favor- 

 able comment from visitors, newspapers, and the technical press. 



The enormous strides which have been made in the last ten years 

 in the improvement of the mechanical transmission of intelligence 

 which includes the telephone, telegraph and wireless methods, have 

 inspired the divisions to rearrange and enlarge the collections relat- 

 ing to this subject. Toward this end there was received as a transfer 

 from the Signal Corps of the Army telephone, telegraph, and radio 

 apparatus comprising about 1,000 objects, and including types of 

 apparatus developed by the armies of the United States, the Allies, 

 and Germany before and during the World War. 



A valuable addition was made to the collections relating to the 

 railway industry of a model of the "Atlantic " type locomotive, made 

 and loaned by E. Howard Askew, Baltimore, Md. ; and through the 

 interest of Joseph R. Darling, Kew Gardens, Long Island, the collec- 

 tion of road vehicles was enhanced by the gift of the original three- 

 wheeled gasoline automobile made in 1898 by Karl W. Kelsey. 

 There was added to the aircraft collections a model of the aircraft 

 designed by Sir George Cayley in 1843, the model being made in the 

 division workshop ; one of the four Liberty engines which propelled 

 the now famous NC-4 hydroplane across the Atlantic Ocean in 1919 ; 

 and a series of six models illustrating the foremost types of aircraft 

 used by the Navy. 



The Ford Motor Company, Detroit, Mich., presented a motor 

 driven magneto testing machine. Its particular value to the collec- 

 tions and the purpose for which it was presented are that it clearly 

 demonstrates one of the fundamental principles of dynamo electric 

 current generation. 



For addition to the section of machine tools there was received as 

 a gift of the E. Ingraham Company, Bristol, Conn., a wood-working 

 machine, called a shaper, patented in 1868, and in constant use in the 

 company's factory since early in the 70's. The machine represents a 

 type of wood-working machinery now obsolete, although its essential 

 features are still in use. 



William Austin Burt, of Michigan, received a patent for a me- 

 chanical writing machine in 1829. A replica of this machine is in 

 the divisions' collection of typewriters to which was added this year 

 an original letter written by Burt on the second machine which he 

 made in 1830. The letter was received as a gift from Mr. Burt's 

 great-granddaughter, Mrs. Howard Corning, Bangor, Maine. 



Mention is made here also of 35 models, made in the divisions' 

 workshop, illustrating mechanical methods, devices and appliances. 



