Fluid flow has been measured through almost every type of porous material. A considerable portion of these permeability studies has been directed towards the flow of gases through a bed of charcoal grains. The interest in gas flow through charcoal…

Native starch has many industrial applications but its use is limited by certain technical difficulties. For example, in paper sizing it is almost impossible to apply the desired amount without making the drying process too slow, because ao much water…

During the past ten years, the importance of the phenomenon of enzymtic adaptation has beoome more and more apparent. Besides being in itself of considerable interest, it possesses implications for general cellular physiology extending outside of the area in which…

One of the most outstanding developments in chemical kinetics has undoubtedly been the evolution of our present knowledge of atomic and tree radical reactions. The literature on this subject was comprehensively reviewed by Steacie in 1946 (1) and again in…

This work is intended to be an experimental contribution to the field of electrolytic conductance. Conductance work is a study of the behaviour of ions under an applied electric field. Since conductivity results can be readily obtained to a high…

One of the best and oldest known tapeworm anthelmintics, a preparation from Dryopteris filix mas, commonly called the Male-fern, was known and used by the Greek physicians of ancient times (1). Their knowledge was lost in the Middle Ages except…

In a Ph.D. Thesis submitted in 1946 from this Laboratory, Tasker prepared in pure form the series of the monoethyl ethers of the polyethylene glycols, R(OCH2CH2)n0H, where n was 1, 2 or 3. The tendency of several of these compounds…

The aim of this work was to synthesize the 2,3-dibromo-inden-2-one-1 by the method of Roser; and to study the reaction of this compound with pyridine and with the three methyl-pyridines. Since it was known that the bromine atom in the…

[...]Realizing the great deficiency of knowledge in this field, the Wood Chemistry Committee of the Technical Section, Canadian Pulp and Paper Association, recommended a thorough investigation of the effects of halogen-containing oxidants on wood and its constituents. This research was…

Knowledge of Cosmic Rays dates back to the early days of research in radioactivity. As in all fields of research the collection of accurate information about Cosmic Rays has been slow. This has been due, especially in the earlier period,…