A plaque honoring Dr. Isidore Cohn, consultant in sergery on the Touro infirmary medical staff, was presented to the infirmary Sunday afternoon at ceremonies honoring Dr. Cohn. The testimonial was held at the Selma F. Gumbel nurses' residence, 3450 Chestnut. Dr. Cohn has been affiliated with Touro for the past 48 years. The observance also marked his 70th birthday.[photo] A REPLICA OF A PLAQUE honoring Dr. Isidore Cohn, consultant in surgery on the staff of Touro infirmary, is pre-sented Dr. Cohn by Leo Hirsch, president of the board of man-agers of the institution, during ceremonies Sunday honoring Dr. Cohn for his 48 years of service to Touro. The actual plaque will be placed in the outpatient clinic of the surgical department of the infirmary.