Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 342
THE ANALYSIS OF LIGHT.Fig. 273. 337 … The production of halos may be illustrated experimentally, by crystallizingvarious salts upon plates of glas.s, and looking through the plates at the sun,or a candle. A few drops of a saturated solution of alum, spread over aglass so as to crystallize quickly, will cover it with an imperfect crust…
Physics · Science · Technology
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