K. DOMESTIC AND HOUSEHOLD ECONOMY. 445 



preventing the ingress of water to the interior of the dress. 

 The back and front of the shirt are also double, the cavity in 

 the back extending upward over the back of the neck to the 

 head. The pantaloons are also double from the waist to the 

 knees, forming: cavities front and back for inflation. All 

 tnese cavities are provided with flexible tubes, long enough 

 to reach the mouth of the wearer, and have suitable valves 

 and stop-cocks. By means of these tubes the several parts 

 of the dress may be inflated to any desired degree. At the 

 upper edge of the pantaloons is fastened a rigid hoop, over 

 which is stretched the lower edge of the shirt, and secured 

 water-tight by means of a waist-belt drawn firmly all around. 

 By dividing the dress into two parts, which can be readily 

 united without water- leakage, it can be adjusted by the 

 wearer in a short time and inflated without aid from others. 

 Besides its buoyancy, a special advantage is claimed for the 

 dress from the fact that the air cavities surround the vital 

 portions of the body, and protect it from being chilled by 

 long exposure in the water. 



NEW LUMINOUS MIXTURE. 



In Paris, the watchmen in all magazines where inflammable 

 or explosive materials are stored are said to use for purposes 

 of illumination a light prepared according to the following 

 method : A clean glass phial of oblong shape is taken and fill- 

 ed with boiling olive-oil to about one third of its volume; 

 into this is dropped a piece of phosphorus about the size of 

 a pea, upon which the phial is tightly closed with a cork. 

 When it is required for use, the cork is removed, the air is 

 allowed to enter, and the phial is recorked. The empty space 

 above the liquid will then be found to have become luminous, 

 the intensity of the luminosity being about equal to that ob- 

 tained from an ordinary lamp. As soon as the light becomes 

 feeble, it can be restored by opening the phial and permitting 

 the entrance of a fresh supply of air. 



PEROXIDE OF HYDROGEN FOR CHANGING BLACK HAIR TO A 



GOLDEN YELLOW. 



Professor Schrotter, of Vienna, examined carefully the high- 

 priced cosmetic recently introduced by Thiellay, of London, 

 for changing the color of black hair to a golden yellow. He 



