Symud i'r prif gynnwys
Cuddio Rhestr Erthyglau

19 erthygl ar y dudalen hon

COUNTY SCHOOL GOVERNORS.

Towyn and Aberdovey Urban…

Farming Notes. --

A Plucky Policeman's i Adventure.

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Reviews.

ABOUT DISINFECTANTS.

THE WONDERS OF COMPRESSED…

THE WORK OF A HEART.

A NEW GLASS DECORATION.

Newyddion
Dyfynnu
Rhannu

A NEW GLASS DECORATION. Colouring glass by penetration offers varied and attractive results. Silver salt in small quantity, but varying with the intensity of colour desired, is placed upon the surface of the glass, which is then heated to 500(leg. or 550(leg. C., baking for five minutes giving a yellow Btain to a depth of 150th of an inch, which is increased to a 15th of an inch in 18 hours." The yellow shows a beautiful greenish or bluish fluorescence in reflected light. Lace patterns can be transferred to glass by this method, colotired monograms may be obtained, and even collodion negatives may be printed in various colours. Silver and copper give a red, while gold and iron salts have been used for other effects,

ABOUT OZONE.

KEEPING A STRAIGHT LINE.

LEONID SHOWERS.

A NEW GUN-SIGHT.

VARNISH.

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A Plucky Policeman's i Adventure.