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Experiments in Underground Communication Through Earth Strata
Technical paper issued by the Bureau of Mines over studies in mine safety and communication. The methods and equipment used in the studies are presented and discussed. This paper includes tables, illustrations, and photographs.
Date:
1928
Creator:
Ilsley, L. C.; Freeman, H. B. & Zellers, D. H.
Object Type:
Report
System:
The UNT Digital Library
[Letter from William Hagen to the Reverend R. Osthoff, April 17, 1928]
Letter from William Hagen to the Reverend R. Osthoff, noting the extension of the deadline to apply for summer repairs, and asking for Osthoff's.
Date:
April 17, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, August 31, 1928]
Letter from William Hagen to the Reverend R. Osthoff, approving the rent for Professor Viehweg, discussing a sewer connection, and raising the janitor's monthly salary.
Date:
August 31, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, October 5, 1928]
Letter from William Hagen to the Reverend R. Osthoff, sending Osthoff building orders for his files, and informing him that he should soon be receiving money.
Date:
October 5, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, November 7, 1928]
Letter from William Hagen to the Reverend R. Osthoff, mentioning that the voucher for sewer connections has been forwarded.
Date:
November 7, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, June 4, 1928]
Letter from William Hagen to the Reverend R. Osthoff, approving the construction of a residence for the director. He also briefly mentions purchasing a made-to-order garage for the janitor's car, to be erected by the janitor himself.
Date:
June 4, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, May 23, 1928]
Letter from William Hagen to the Reverend R. Osthoff, discussing a new resolution that will cut down on summer repairs, if not stop work entirely.
Date:
May 23, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, July 3, 1928]
Letter from William Hagen to the Reverend R. Osthoff, approving a salary of $1650 for Pastor Viehweg, G.
Date:
July 3, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History
[Letter from William Hagen to the Reverend R. Osthoff, April 17, 1928]
Letter from William Hagen to the Reverend R. Osthoff, informing him that the Synod has agreed that they will not pay the travel expenses of professors unless they themselves requested the professors to make the trip.
Date:
April 17, 1928
Creator:
Hagen, William
Object Type:
Letter
System:
The Portal to Texas History