Excerpt from Thirty-First Annual Report of the Provincial Board of Health of Ontario, Canada, for the Year 1912 TO the honourable W. J. Hanna, k.c., Provincial
Excerpt from Thirty-Eighth Annual Report of the Provincial Board of Health of Ontario, Canada, for the Year 1919 I herewith beg to present for your consideratio
Excerpt from Forty-First Annual Report of the Provincial Board of Health of Ontario, Canada, for the Year 1922 The excellent showing made by the Branch Laborato
Excerpt from Thirty-Third Annual Report of the Provincial Board of Health of Ontario, Canada: For the Year 1914 The high rates existing in several of the counti
Excerpt from Thirty-Second Annual Report of the Provincial Board of Health of Ontario, Canada, for the Year 1913 The courtesy of the various municipal authoriti