In regard to the above processes, we may observe, that those given for Adrianople red in _Ure's Berthollet_, are more numerous, being regularly numbered to the _seventeenth_, or last operation called _brightening_. After a careful attention to those processes we see no reason to alter our own, yet we nevertheless advise the dyer to become acquainted with what is stated in that work, many details being there given for which we have not room, particularly for making _different shades_ of the colour. We add, however the following from vol. ii. p. 140. "Cotton dyed red, may, moreover, be made to pass through all the shades, down to the palest orange, thus: pure nitric acid is diluted with two-fifths of water; chips of tin are oxidized in it till the liquor grows opal; the solution is employed at different strengths; the colour varies according to the concentration of the solution: when it is strong, shades are obtained which have some relation to those of scarlet. "In general, when brilliant colours are desired, we must not charge them too much with oil; we must give feeble leys long repeated, charge little with alum, employ the best madders, and, at last, brighten powerfully without sparing soap." We have directed _good_ olive oil; but M. VITALIS directs fat oil, (_gallipoli_) to be used in the processes for dyeing Adrianople red, and Berthollet says, it must not be a _fine oil_, but one containing a strong portion of the extractive principle. A factory for dyeing this red was first established in this country in 1790, by M. PAPILLON, who obtained a premium from the Commissioners and Trustees for Manufactures in Scotland, for communicating the details of it on condition it should not be divulged for a term of years, during which _M. Papillon_ was to have the sole use of his secret. This term being expired the process was published. See vol. xviii. of _Tilloch's Magazine_.