The Nenana daily news., 1919-06-06

used in the war, and how American ingenuity is turning some of them 10 peace-time uses will be part Of an educational exposition of the interior department that will be held in Washington. The exposition however, will not be confined to these exhibits, but it is planned to include a display of the depart ment's ramifications into the life, safety and progress of the country resulting from the haphazard addi- ton of bureaus from time to time. The various exhibits will make the exposition of national scope.
 How number of the bureaus of the non-miiliary department did their bit in the war will be shown by the displays revealing the de- velopment of a machine to detect the presence of the enemy and spoil his plans, the recovery of hidden mineral treasures needed to forge war engines, and the improvement of super-poisons. Along with these achievements, the exposition will disclose inventions of private Amer ican citizens, some of which were regarded of such importance tha. the issuance of patents was withheld under the ban of secrecy until the signing of the armistice
 The patent office. a bureau of the department, also will exhibit historical models of epoch-making American inventions. and from it's cob-webbed recesses as secret as the grave, will resurrect certain foibles or fancies of famous men. Abra- ham Lincoln, for instance, designed a contrivance to facilitate the pass age of vessels over shallow waters, and his invention will be shown at the exposition.
 During the war, the bureau of mines, another wing of the depart ment, devoted almost its entire at tention to war problems. The geo. phone, listening device invented by the French to detect enemy tun- neling and turned over to America for further development, will be part of the bureaus display This device is to be used in locating entombed miners, and a further de velopment in the making is a pro- posed international code of rappings 10 enable entombed men to talk through solid earth. The gas masks. the making of shrapnel shells, and the methods of American oil drillers. which kept a continuous stream Of liquid fuel flowing into the war zone, will be shown by working models.
 The geological survey already is using the airplane in making topo- graphic maps, and this new method will be illustrated at the exposition Models also will show undeveloped regions investigated by geologists, topographers and engineers and the same regions after they have com pleted their work and shown the natural resources and the possible development of the territory.
 How America has shown it's grati- tude to its war heroes and thei. dependents will be demonstrated in the pension bureau display In line with Secretary Lanes farms-for- soldiers plan, the bureau will show that the country in the past has always advocated such rewards, this bureau having adjudicated claims for lands and issued land warrants to soldiers for more than 6s,00O, 900 acres. Lincoln, Grant Sherman, Sheridan and Farragut were granted land for service through the bureau, and the applications signed by them will be on exhibition. Important historical papers signed by Wash ington, Jefferson, Hancock, Frank lin, and by Lafayette and Rocham- beau also will be on display.
 The general land office of the department conducts the largest realty concern in the world, and its