Referee's report by Frederick Orpen Bower, on a paper 'Resin canals in the canadian spruce (Picea canadensis (Mill.) B. S. P.)-An anatomical study, especially in relation to traumatic effects and their bearing on phylogeny' by Robert Boyd Thomson and Harold Boyd Sifton Sectional committee: Botany Recommended for publication in Philosophical Transactions, in full. It is 'in a state for immediate publication'. [Published in Philosophical Transactions B, 1926]. Endorsed on verso as received 7 April 1925. April 1925