Order of Canada
Harold Elford Johns, O.C., Ph.D., LL.D., F.R.S.C.
|Harold Elford Johns, O.C., Ph.D., LL.D., F.R.S.C.
|Officer of the Order of Canada
||July 11, 1977
||April 19, 1978
| University Professor and head of physics division of the Ontario Cancer Institute, Toronto, Internationally known as "Father of the Cobalt machine", he has carried out studies of radiotherapy which have not only advanced it from an art to a science, but have increased the rate of cancer cures.
|Deceased on August 23, 1998.