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ihibition," according to Professor lacAIIister. "It makes possible unmited repetition without variation, nd with the use of a magnetic tape ibrary, permits different students to ork at different speeds, allowing ceded repetition for some without enalizing those who do not require . The lab 'mirrors' the student's wn pronunciation so that he can ear himself objectively."
ACUITY PREPARE TAPES
lost tapes, both for instruction and sting, are prepared by Princeton culty members to make sure they late directly to course plans. Exptions include pre-recorded tapes literary material and taped marial for classes using texts written r lab use.
le lab procedure at Princeton is sed on a library system with each jdent individually using magnetic )es for listening and practice. About 100 rolls of tape are used in a year, duding 4,300 on 5" reels and 1,500 7". And Scotch® brand Magnetic pe No. 311, made with exclusive INZAR® backing, is the tape that s lab uses most frequently.
HAT IS TENZAR?
I AZ AR backing is a special material
I I in making No. 311 tape that
p N i<les 16 times greater tear resist
' lian acetate backing! This extra
-th tape won't break when edges
licked — withstands continuous
! ast stops and starts, even rough,
'■rienced handling. It also stores
iially well— TENZAR backing
les 15 times greater humidity
ance than acetate!
"11 fidelity, TENZAR backed No. 1 ipe is made with high-potency
Students withdraw individual duplicate instructional tapes from library, follow their own best speeds for learning. Master recordings are kept under rigid security.
oxides. Exclusive Silicone lubrication protects recorder heads, eliminates squeal, extends tape life. This tape also provides classroom economy, because it's priced in the same range as standard tapes! For both economy and long wear, we suggest you specify "Scotch" Magnetic Tape No. 311 with TENZAR backing the next time you order tape. Available on clear or color-molded transparent reels in red, green, blue and yellow for easy coding, in either 5" or 7" sizes. Free in each box — end-of-reel clip that prevents tape spillage during handling, storing and mailing.
SPECIAL OFFER FOR LANGUAGE INSTRUCTORS!
"First the Ear . . .", an exclusive taped report prepared for 3M, lets you hear leading educators tell how magnetic tape helps them teach languages, both in high schools and colleges. This report, on TENZAR backed tape, is yours for only $1.50. Send check or money order to Minnesota Mining and Manufacturing Company, Magnetic Products Division, Dept. MCG-51, Box 3.300, St. Paul 6, Minn.
]yjlNNESOTA ]yjlNING AND ]^A N U FACTUR I NG COMPANY ^^^^^^^
...WHERE RESEARCH IS THE KEY TO TOMORROW^TI
-^>
"SCOTCH," "TENZAR" and the Plaid Design are Reg. TM's ot 3M Co., St. Paul 6, Minn. £) 1961 3M Co.
1 I < ATioNAL Screen and Audiovisual Guide— May, 1961
3M
COMPANY
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