Show heat tempered I 1 I 1 hundreds of thousands of visitors entering the pavilion de saint go bain at the paris exposition walked up 50 glass steps six feet wide and supported only for a couple of inches at either end these steps were of a heat tempered glass now gaining use in this country for port holes transparent over doors windows in pilot houses on boats and translucent bathroom and kitchen ceilings this glass which scientists call tuf flex is 48 times as strong as regular plate glass of the same thickness and withstands extreme heat and cold shocks it is being used extensively in portholes port holes of new battleships to save weight |