WORLD ACHIEVEMENT

Manawatu Standard, Volume LIX, Issue 36, 11 January 1939, Page 9

WORLD ACHIEVEMENT

ARTIFICIAL SUNLIGHT. There is nothing to surprise us in artificial sunlight. Indeed, there an few things to surprise us in these day of artificial silk and artificial ruhbei and artificial Jaces.

Isut the artificial sunlight is not lov ed l>y those who make up —for it is th kind of greenish light which is beim more and more extensively adopted ii our street lighting. The old incur descent lamps are lasing scrapped an the new bulbs are being used becau they supply less heat and more ligh are cheaper in current, and give sir a diffused light that there are prr. tie-ally no shadows. The motori blesses every city street flooded wit these greenish lights, .though evei woman knows they are not flatterin to her complexion.

These lamps are, in brief, glut cylinders a little over an inch wid and about ten inches long. Inside are : few drops of mercury, and there i what is known as an electrode at cue) end. When the current passes throng! it causes a bluish-green flame o luminous mercury vapour. Wonderful as these lamps are, the.\ are not the last word. In New York and London there are high-class florist and fur shops where still more brii limit lamps are used, all giving a ligh wonderfully similar to that of sunshim —diffused and brilliant. These lamparc not unlike those in our street except that in the glass there is :• chemical which absorbs the ultra-viole! rays we cannot see and changes them into a kind of fluorescence wo can see thus giving greater illumination.—(l.)