Other Symposia and Summer Offerings

The fourth spring meeting of the Instrument Society of America will be held May 12 and 13 at the Royal York Hotel, Toronto, Canada. The registration fee for ISA members and for members of cooperating societies is $2.00; the non‐member registration fee is $3.00. Pre‐registration is urged, and those who have not received a registration card may write to Richard Rimbach, National Secretary, Instrument Society of America, 1117 Wolfendale Street, Pittsburgh 12, Pa.