chemical changes occurring in the tannery. In this last capacity, it is used as a solvent for soaps, dyes, adds, tannins,etc. The effects of water impurities on boiler working are weU known. The impurities react with many of the tannery chemicals causing (1) wastage of chemical, and (2) production of inferior leather owing to stains, interference with finishing operations, etc. The important features in connection with tannery water have been brought out in the manner depicted in the diagram. The case available has glass walls and measures 66" X 36' X 20'. It has three staggered glass shelves. At the top are exhibits showing the amounts of impurities per gallon of London water. On the two lower shelves are exhibits showing the reactions of these impurities with tannery chemicals. On the floor of the case are technical specimens demonstrating the effects of the impurities in working practice. The rectangles represent cards bearing concise descriptions of the various items. The lines connecting the cards represent ribbons of different colors. The eye naturally starts a t the central card and travels along the ribbons to the various specimens. The effects of temporary hardness, permanent hardness or iron are easily picked out by blue, red, or green ribbons. The case vividly teaches the brief facts relating to a definite problem. All the tricks of the window dresser are used and indeed his various little gadgets-clips, struts, stands, etc.-have been found most useful in setting up the exhibit. Were a larger case available, one might add objects illustrating water testing and softening.
Lack of Training Chief Cause of Failure. Lack of proper training during childhood, and not lack of ability. was blamed for most of the failures in life by Dr. Sanger Brown, speaking a t the recent session of the Orthopsychiatric Association in New York. Dr. Brown discussed the chief reasons why people fail and hecome dependent. Actual lack of ability daes cause some failures. Dr. Brown said, but the number of such failures is far less than might be supposed. A neglected child who receives little training and has little sense of responsibility is apt t o become shiftless and improvident in later years. Some people can overcome handicaps of this sort. hut many cannot. Certain unfortunate mental traits and characteristics that are acquired during childhood are also potent causes of failure later in life, Dr. Brown stated. Such traits injure the personality and are thus a b'i handicap throughout life. I n this class belong the querulous, the brow-beaten, the amhitionless, the fault-6nder. They do not lack intelligence and their mental defects are generally acquired during childhood and not inherited. Proper education will prevent failures in two wavs. It will prevent the develooment of such handicapping mental traits and attitudes and will give the child training in a profession or trade to which he is naturally adapted.-Science Sem'ce
