Users of the Type 874-LB Slotted Line will be glad to learn that the complete instruction book for that instrument is now available. Copies have been sent to all who returned the cards that were enclosed with slotted lines already shipped. If you are using the General Radio Slotted Line and have not yet received a copy of the instruction book, please request it on your company letterhead.
This book is a more comprehensive operating manual on slotted-line measurements than any other that we have seen. It should be very useful for classroom and laboratory instruction, and we shall be glad to send a copy to any teacher who requests it on his college or university letterhead. Additional copies for student use are available at
a nominal price to cover the cost of printing.
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