Bill and Gordon,
SNIP 1 - >ATM - Book One, ("Amateur Telescope Making"), A G. Ingalls, Ed., >Scientific American Press, may be the book you remember using. > >You can also find instructions in older editions (into the 1950s,) >of the "Handbook of Chemistry and Physics," Chemical Rubber >Publishing Co.. > >Good Luck with it, > >Bill SNIP 2 - >Having looked up silvering in Amateur Telescope Making, Book 1, >and the Handbook of Chemistry and Physics (35th edn.) I returned >to my computer to find that Bill Maddux had beat me to it. > >The latter reference recommends the Rochelle salts process >(instead of Brashear's, which uses sugar as a reducing agent) as >being slower and better for making half-silvered mirrors. >It describes how to make half-silvered mirrors using it. > Gordon T. Uber, 3790 El Camino Real, Suite 142 Many thanks for the pointers which I will request through my local library service. After all these years I can't be sure that this is the book I used but I'm pretty sure it wasn't Book 1 of a series. In any event I can now solve my problem with a choice of methods Thanks again Tony ========================================================== \ ** ******* \\ ** ** \\ ** ******* *\\ ** ** *\\ ******* ******* **\\ ***\\ Tony Moss, Lindisfarne Sundials *****\\ 43, Windsor Gardens, Bedlington, *******\\ Northumberland, England, NE22 5SY, **********\\ 55° 07' 45" N 1° 35' 38" W Tel/FAX +1670 823232 ========================================================== Horizontal, Vertical, Declining, Analemmatic & Capuchin Sundials individually made in solid engraving brass. Professional-quality Dialling Scales, 'engine-divided' meridian layout instrument with software. Analemmatic dial plots - any size for any latitude. ==========================================================