Page 451: kilos per cm² × 14·22 = lb. per inch changed to kilos per cm² × 14·22 = lb. per inch²
Page 486: Acid green B.B. changed to Acid green BB.
Page 501: Blue-backing changed to Bluebacking
Page 507: Oxalic acid, page number 155 corrected
Page 508: Pay-pay changed to Paypay; Phylocladus changed to Phyllocladus; Protacæ changed to Protaceæ
Page 509: Schutzenberger changed to Schützenberger
Page 512, Zymases: page numbers 17, 61, 296 inserted
Index: some entries moved to their proper place.