REPORT OF NATIONAL MUSEUM, 1914. 39 
ous issues made by the Government in 1875 for the Centennial Ex- 
hibition of 1876 is complete, with the exception of the 1, 3, 6, and 12- 
cent of 1871 and the 2 and 5-cent of 1875. The collection also con- 
tains the 2, 7, 12, and 24-cent stamps, special printing of 1880; the 
2 and 4-cent, special printing of 1883; the complete issue of 1890, 
1 to 90 cents, in imperforate blocks of four; a complete sheet of the 
2-cent Columbian issue, 1893, imperforate, signed and attested by 
J. Macdonough, president of the American Bank Note Co., and A. D. 
Hazen, Third Assistant Postmaster General, as the first Columbian 
stamps printed; the 6 and 8-cent stamps of the issue of 1895 printed 
in error on revenue paper; the 1, 2, and 4-cent inverted medallions 
of the issue of 1901, the 2-cent being the greatest rarity in the United 
States series of this century; a complete set, 1 to 15 cents, of the 
issue of 1908 on bluish rag paper; a complete set of the postage due, 
special printing of 1880, except the 1-cent denomination; a complete 
set of the issue of 1893, special printing, imperforate blocks of four; 
a copy of the $5 stamp of the State Department; a set of newspaper 
stamps, 2 to 96 cents, special printing of 1875; a complete set, 1 to 
60 cents, in imperforate blocks of four, of the special printing of 
1893; and a complete set of the issue of 1894, bureau printing of 
the American Bank Note design, 1 cent to $6. 
The Museum has been fortunate in securing for the classification 
and installation of its stamp collection the services of the experi- 
enced philatelist, Mr. Joseph D. Leavy, to whom credit is due for 
its present excellent condition. 
MECHANICAL TECHNOLOGY. 
In 1885 a section of steam transportation was established as a 
branch of the department of arts and industries. The title was soon 
changed to “transportation” and subsequently to “transportation 
and engineering,” the aim of the section being, it was stated, to pre- 
sent an object lesson illustrating the history of devices to promote 
travel and commerce and to convey intelligence. As early as 1888, 
appliances, such as the stationary engine, etc., for generating power 
for manufacturing and for producing heat and light had also been 
included, and other subjects were soon added, comprising naval archi- 
tecture, previously organized as a separate section, airships, bicycles, 
automobiles, electrical devices for all purposes, measuring devices, 
small firearms, and various other inventions. 
In 1895 the title became “technological collections,” and the cu- 
rator was also placed in charge of the collections belonging to certain 
other sections which had recently become disorganized through the 
lack of space and of means for their maintenance. Among these 
were textiles, foods, and animal products, with which, for obvious 
