Vacuum Tube Oscillator and Coal Mine Ventilation Competition
A National Geographic piece discusses coal as a pillar of civilization and tours a modern anthracite colliery describing air shafts, ventilation, and mine layout. It explains vacuum tubes as oscillators enabling undamped high frequency currents for radio use and amplification.
MENTIONED IN THIS ARTICLE
National Geographic Society
Washington, D
America
Hassco Aftaore
Pikes Peak
Bob
Fel
Luce
Joseph Maillard
Static and mining tales span a wide ledger
An eclectic mix covers radio static physics with three electrode tubes and mine operations detailing coal extraction processes. It describes a miner’s daily routines from entry checks to carloads of coal and the breaker plant separation of coal from slate.
MENTIONED IN THIS ARTICLE
China
France
New Alb Lodge Of Elks Opens In Indianapolis
The new Elks lodge building in Indianapolis, costing 150600 dollars, has been opened. Lieut Col Basil Middleton will lead the rifle team representing the Indiana National Guard at Camp Perry this month. Hal B Smith, adjutant general, announced the events and tax rate changes. The Washington city council set next year’s tax rate at 1.15 per 100 of property, three percent lower than this year.
MENTIONED IN THIS ARTICLE
Elwood
Gary
Oficialdom
Charles Miller
George Saubter
Hammond
Council of Administration of the
Indiana Department, Veterans of Foreign Wars
Indianapolis
South Bend
Department of State Police
Indiana
Indianapolis News
Heanttely
Lafayette Public Schools
State Emergency Coal Committee
Public Service Commission
State Coal Committee
Bartholomew County
United States
Goshen City
Central Fire Station
Alb Lodge of Elks
Basil Middleton
Indianational Guard
Camp Perry
Hal B. Smith
Washington City Council
Tlawor
A Tree, Inc
Temple St
Springfeld
Mass
Radio boom sparks dreams and city plans across the nation
The Buffalo News notes kissing by wireless and jokes about farmer plow handles as radio entertains couples and travelers. Chicago seeks 68000 for police radio gear while St Louis plans a roof mounted receiving set for concerts. Canada and the United States see booming sales, and engineers find work as the Federated American Engineering Societies reports 900 placements since January.
MENTIONED IN THIS ARTICLE
The
Buffalo News
Buffalo
N. J
Niagara
Chicago
St. Louis
United States
Canada
Federated American Engineering Societies
Electrical and Mechanical Engineers
Also Mentioned on This Page
Fell and
Lucie
New Orleans
Jachin
Tanlac
Waetern Panasda Eence
John Walker Harrington
Boe
Ine
Lawrence County
Mlinois
Vincennes
American Red Cross
Lawrenceville
Grant County
Matter Park
Marion
Grand Army of the Republic
Women’s Relief Corps
Martin Boots
Columbus Coal Company
Brazil
McClelland Coal Company
Riley
Brazil Collieries Company
Bright Gem Coal Com
Pany
Jessup, Parke
Knox County
Simpson Orchard Company
Inox County
United States Army
Army
J. J. Wilson
Alex E. Arch
Neainet Tha Carmanec
Uae
Prayery
C. C. Bitler
Newcastle
O. H. Rees
Mknightstown
Pension Examining Board
Henry County
Post Office Department
Civil Service Commission
Middlebury
Mooresville
Wwapbasa
James Wilson
Fountain County
Cluer
Maentia
Pike’s Peak Ocean-to
Marion ‘Ounty ‘Criminal Court
Valparaiso University
Valparaiso
Noble County
Noble County Farm Bureau
Kendallville
Indiana State News
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