Salt Lake Telegram | 1932-06-04 | Page 4 | Freaks and Oddities in Science News

F FREAKS REA K Sand and 0 ODDITIES D D I TIE S SI I IN N S SCIENCE C I E NeE NEW NEWS NEWS- S- S OT enzymes substances which are always al- al U found in ways mixtures in all animal and plant tissues and which have the power both to break down or digest proteins and to s synthesize or cause the union of different chemical substances I or to break them up into their constituent parts are very complex They are always found as mixtures mix roh tures but there are meth methods of separating them and of proving the specific action of each separate enzyme 0 0 For years chemistry professors have entertained classes classes by letting them listen to the cry of tin a creaking or tearing sound that Is emitted b by a metallic tin when bent Now it has been discovered that this noise of tin is a sort of birth cry of ot the crystals r in the metal becoming twins Cadmium and zinc were were- also made to produce cries The tin cry is produced by twinning in the metal and not by grinding of crystals against one another during bending as has previously been supposed a The Hoover dam like other modern modem structures is to have a a. mechanical refrigerator But this will not be for conventional reasons The contractors contractors con con- tractors who are arc soon to start pouring the colossal sat mass of concrete in Black canyon must contend I with a peculiar habit of Portland cement of Im Importance importance un- un only with very large larce blocks of material Cement has a considerable amount of latent chemical chem chem- ical energy which is released during the setting operation The silicates and of ot lime iline of which Portland cement is composed generate heat when they combine with water In the vast block of Hoover dam the heat will not have a a. fair lair chance to escape without special assistance Without refrigeration the inside portion of ot the concrete would harden at steaming hot tempera tempera- tures The outside would set hi In a cool state Indue In Indue Indue due time the hot core care would cool shrink and crack An elaborate and very expensive system is planned whereby chilled water will circulate through numerous pipes in the freshly poured concrete It is estimated that this item alone may cost a little more than i 0 Traveling towards the earth at a speed of over half a million miles a day the planet Venus is isnow isnow isnow now shining brilliantly in the western evening sky brighter than it has been for many months On Sunday May 22 it was at is maximum bright bright- ness This is about twelve and a hall half times as brilliant as Vega the brightest star now seen in inthe inthe inthe the evening sky which shines in the northeast