involution forms is evident, as the unbranched nature of the filaments and the existence of lateral bulgings prove that they are in an active condition of growth. _Lysidin._--Ladenburg describes a compound obtained in the state of hydrochloride by heating ethylene diamene hypochloride with sodium acetate. The composition of the freebase is C₄H₈N₂ and is termed _lysidin_. The aquems solutions dissolve uric acid and the application of lysidin in the treatment of diseases arising from the secretion of uric acid is being investigated. Grawitz describes it as a crystalline body of a light red color, readily soluble in water and possesses a peculiar taste. It is administered in doses from 15 to 80 grains daily, dissolved in carbonic acid-water.--_Deutsche med. Wochenschr._, 1894, 786. _Gaseous Formaldehyde._--R. Cambier and A. Brochet prepare this aldehyde for disinfection in two ways: 1. By the depolymerization of trioxymethylene by heat, and, 2. Direct production by the incomplete combustion of methylic alcohol. Formaldehyde possesses antiseptic properties only when it is in the condition of a gas. On cooling, ordinarily, it is spontaneously polymerized to an inert solid. If it is allowed to cool, in the presence of much air this process does not take place and hence the formaldehyde retains its bactericidal properties. Experiments made at the bacteriological laboratory of Montsouris have enabled the authors to sterilize the ordinary dust of rooms as well as cultivations of various pathogenic micro-organisms.--_Compt. Rend._, 1894, _No._ 15. NOTES HERE AND THERE. _Soda Water._--In Byron’s “Don Juan” we find the following in Canto II., 81, 186: Ring for your valet--bid him quickly bring Some hock and soda water, then you’ll know A pleasure worthy Xerxes, the great king; For not the best sherbet sublimed with snow, Nor the first sparkle of the desert spring, Nor Burgundy, in all its sunset glow, After long travel, _ennui_, love or slaughter, Vie with that draught of hock and soda water.