REPORT OF NATIONAL, MUSEUM, 1&20. 33 



one of the members of its scientific staff and the resignation soon 

 afterwards of tlie remaining tAvo members. Mr. (iilbert, after sever- 

 ing active relations continued, under appointment on an honorary 

 basis, to give advisory supervision over these collections, all of which 

 had been developed under his direction. It is hoped that another 

 year will find this division manned and again to the front as it was 

 so signally during the period of the Avar. 



Probably the most imj^ortant addition to the collections of the 

 diA'ision of mechanical technology during the year Avas a tAvelve 

 cylinder Liberty airplane motor, the gift of the Lincoln Motor Com- 

 pany. The motor is complete in every detail and in addition, \'arious 

 portions are cut aAvay to show the interior parts in operatiAe rela- 

 tion. Another accession of note Avas a replica of the original typog- 

 rapher, inAented and patented by William Austin Burt in 1829, the 

 gift of his grandson, Hiram Austin Burt. As representatiAe of the 

 early beginnings of tlie American typcAvriter this forms a A'ery im- 

 portant addition to the exhil^t shoAving the development of the type- 

 Avriter. The time-keeping collections Avere enhanced by the gift of 

 tAvo Avatches from Mr. George W. Spier, honorary custodian of 

 A\'atches. In the section of marine transportation there Avas added 

 a model of one of the freight ships built at Hog Island Shipyard in 

 1919, received from the United States Senate Committee on Com- 

 merce, through Senator Wesley L. Jones, Chairman. 



Early in the year plans for the future development of the division 

 of mechanical technology Avere formulated, the end in AdeAv being a 

 Museum of Engineering. Accordingly, the collections in care of the 

 division Avere first rearranged in the halls, the basis of rearrangement 

 being the kind of object rather than the source, thus, one hall noAV 

 includes all objects relating to land transportation and aerial trans- 

 portation; another hall, marine transportation; another hall, metrol- 

 ogy and mechanical transmission of intelligence. This Avorlc re- 

 quired the full time of the diA'ision's force during the year. 



The reports of the head curators in the natural history depart- 

 ments and of the curators in the department of arts and industries, 

 beginning on page 57. giA'e in detail the additions to and the Avork 

 on their collections during the year. 



NATIONAL GALLERY OF ART. 



The Xational Gallery of Art — the department of fine arts of 

 the Museum — continued in charge of Dr. W. H. Holmes, as curator, 

 tlie collections occup\'in2: mainly the central skylighted hall on 

 the first floor of the north Aving of the Natural HistorA' Buildiuir. 

 Good progress Avas made during the year in the accjuirement of art 

 Avorks and constant attention Avas given to all classes of exhibits 

 tio2y°— 20— 3 



