Letters Sent to Dr. James E. Ives, March 13, 1929

March 13th,19291 Dr. James E. Eves, Room 1-23 Bldg., 16th Seventh St., S.W. Washington, D.C. Dear Dr. Ives: Your letter of March 12th, is at hand. The instrument which we have ordered from Gunther & Tegatmeyer is of the Tulf-Hess Bifilar type. This instrument was ordered on September 13th, and as I advised you in my letter of yesterday, is to be shipped from Brunschweig, Germany on March 15th. Our experience is that these people are very slow in making delivery of any equipment ordered. I am familar with the ordinary Wulf type of instrument as well as with the Wulf-Hess, but have no knowledge relative to the Kolhoester type. While I do not doubt that this type is more sensitive than the Wulf-Hess, the point to be considered for your work would be the portability of the instrument - that is it would be best not to attempt to use an instrument which was so sensitive that considerable technique would be involved in setting up the instrument for work. We have found the Wulf-Hess instrument sensitive and very reliable, With the added feature that it is portable, and it requires practically little or no adjustment prior to use. We shall advise you as soon as the instrument now on order has arrived. Very truly yours, Vice President. HHBarker: RH