Randy Scholle's reaction (Med. Zh., 1922, no. 5)

The essence of this reaction, which occurs in all infectious diseases of the central nervous system, is as follows: to 1 cubic meter. site, concentrated (1:15) carbolic acid, poured into a small test tube, add 1 kyle of cerebrospinal fluid taken from a patient; if in this case there is an infectious disease of the central nervous system, then, due to the increased content of globulins in the cerebrospinal fluid, a smoky cloud of turbidity is formed in a few seconds throughout the contact of the drop falling to the bottom with the carbolic solution, while the normal liquid of this cloud does not give .

New response to sexual characteristics

Prof. Bernatsky (Doctor. Gaz., 1924, No. 18) describes a new specific reaction to the sexual characteristics of plant and animal tissues. 1/4 of the timing is taken. test tissue, crushed in a mortar, placed in a small test tube ("port-fleur"), 1 cube of site is poured, a mixture of equal parts of 0.582% sodium hydroxide solution and 0.816% potassium hydroxide solution, the mixture is thoroughly mixed with a glass rod, and 1 a drop of a color indicator consisting of 2 hours of alcohol (95-96 ) 1% dalpy solution, 1 hour. one

The Boltz (Acetic-Anhydride) Test in Cerebro-Spinal Fluid

The acetic anhydride test was introduced in 1923 by Boltz, who regarded a positive result as diagnostic of syphilis of the central nervous system. The technique of the test is simplicity itself, and is as follows: Place 1 c.c. of spinal fluid in a small test-tube. Add 0.3 c.c. of acetic anhydride drop by drop; shake. Add 0.8 c.c. concentrated sulphuric acid drop by drop; shake. After five minutes examine the colour of the fluid against a white background. A lilac or blue-pink coloration is positive.

Studies with the liquid hydrogen and air calorimeters

The calorimeter employed in the following experiments was similar to that described in my paper on “The Scientific Uses of Liquid Air,” and in an improved form in Madame Curie’s work “Recherches sur les Substances Radio-Actives,” 2nd edition, p. 100. A sketch of the apparatus appears in my paper on “The Absorption and Thermal Evolution of Gases Occluded in Charcoal at Low Temperatures.” The arrangement employed consists essentially of a large vacuum vessel capable of holding 2 or 3 litres, into which is inserted a smaller vacuum vessel of 25 to 50 c. c. capacity constituting the calorimeter, the latter being sealed on to a long narrow tube which projects from the mouth of the exterior vessel, in which it is lightly held by a loose packing of cotton wool. A little below the upper end a branch tube is taken off which conveys the volatilised gas from the calorimeter to the gas receiver. To the extremity of the projecting tube a small test-tube, to hold the portions of substance experimented on, is attached by a short piece of rather wide rubber tubing which forms naturally a movable joint that can be bent into any position. With care I have found this valve gives as good results as more elaborate means of securing the dropping of the substances into the calorimeter. A small vacuum vessel which may contain either solid carbonic acid, liquid ethylene, or liquid air, into which the test-tube is placed, cools the materials to different temperatures below those of the laboratory; or alternatively the substances may be heated in the vapour of water or other liquids.