Would be inclined to try a combination of cryolite and silex to obtain a glass. Comments on his process for decomposing alumina by cyanide of sodium. Sorry to see that FK uses the current forms of chemical notation.
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Would be inclined to try a combination of cryolite and silex to obtain a glass. Comments on his process for decomposing alumina by cyanide of sodium. Sorry to see that FK uses the current forms of chemical notation.
Thinks that aluminum coating on telescope mirrors may work [see FK's 1856-10-9]; also suggests looking into flouric glass containing aluminum for lenses of low dispersion power.
In response to FK's 1866-4-17, JH says that he knows nothing about screw propulsion in ships and so cannot comment on FK's paper.
Looks forward to the new edition of JH's Treatise Astr. Comments on the atmosphere and gases on the surface of the moon. What does JH think of these comments?
Thinks it may be a good idea to utilize aluminium to coat the speculum of reflecting telescopes. Is shortly to take command of iron works and furnaces and hopes to carry out experiments to produce barytic glass.
Has received news of a cargo of cryolite from Greenland. Outlines the various possibilities of using it for the manufacture of chemicals and glass. Sends his method of manufacturing aluminium.
Would like JH's comments on one of his own theories regarding screw propulsion of ships. Sent it to the Admiralty, who rejected it. Can JH's son recommend a good resume of the physical and chemical composition of aerolithes?