JAROS HYGIENIC MATERIAL—MAGNIFIED.
It will be seen that the material is a fleecy wool surface knitted into a cotton framework—resembling in many essential points a natural sheep's pelt. A prominent factor regarded in the claim for a reproduction of the natural pelt, is the preservation of the yolk which, if left in the wool, preserves its pliancy. It forms a kind of natural soap, consisting principally of potash salts with animal oil almost entirely soluble in cold water. Special care must therefore be taken in washing the wool, and this has been one of the latest results added to the success of the "Jaros Hygienic Material." The features warranting precaution in scouring wool, and advised by scientists, are based on the following possibilities: Excess of alkali has to be guarded against, since uncombined caustic acts energetically on the wool fibre, and is indeed a solvent of it. On this account soap solutions cannot be too carefully prepared to prevent making the wool brittle.
"A material of loose texture confining much air in its interstices is warmer than same amount of clothing material closely woven. Wool or cotton carded and spread out in the shape of a wadding and held, will make a warmer garment than the same quantity spun and woven, and similarly covered. This applies with force to underclothing."—"Ziemsen," Vol. XVIII.
PROPHYLAXIS.—In the consideration of a prophylactic measure this Underwear accomplishes the desideratum for protection.
L. D. Rogers, A.M., M.D., in a paper, states:
A fabric, therefore, so constructed as to allow a layer of woolen fibre to lie between the skin and a layer of cotton fibre, and sufficiently open and loose as to contain the largest possible amount of air is the ideal. The Jaros Hygienic Underwear material, a new fabric, seems beautifully adapted to this end. A layer of woolen fibres, soft and fleecy, is firmly held on one side of and in the meshes of an exceeding porous cotton fabric, so that while one extremity of a fibre lies against the skin, the other is in contact with the cotton; thus admitting of the rapid transference of all dampness of perspiration to the cotton where it is retained, and consequently leaving no moisture next to the skin to absorb and diminish the heat of the body. The importance of this subject, and the possibilities of this new fabric for the prevention of colds, and their resultant diseases, can only be appreciated when we remember the simple fact that it is impossible to take a cold so long as a healthy condition of the skin, and an even temperature of the surface of the body, are maintained.