Experimental Researches Concerning the Philosophy of Permanent Colours: And the Best Means of Producing Them, by Dyeing, Calico Printing, &c, Volume 1
T. Dobson, 1814
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according action added addition adds afford afterwards alkali alum alumine animal appears applied ascertained basis beautiful become believe Berthollet blue boiling calico called cause cloth cochineal colouring matter combination commonly considerable considered contained cotton crimson dissolved dyed dyeing dyers effects employed equal experiments fact fixed former give given green important indigo insects iron Italy juice kermes known lately least leaves less light lime linen liquor means mentioned metal mixed mixture mordant muriatic acid natural nearly necessary nitric observed obtained oxide oxygene particular permanent plant portion potash pounds powder precipitate prepared printed probably produced proportion prove pure purple quantity rays rendered respect result says scarlet seems separated silk similar solution solution of tin soon species substance sufficient sulphuric supposed tartar tion true usual vegetable washed wool yellow
Page 294 - And when they had platted a crown of thorns, they put it upon his head, and a reed in his right hand ; and they bowed the knee before him, and mocked him, saying, Hail, king of the Jews ! And they spit upon him, and took the reed, and smote him on the head.
Page 2 - tis a Sense of that Motion under the Form of Sound ; so Colours in the Object are nothing but a Disposition to reflect this or that sort of Rays more copiously than the Rest; in the Rays they are nothing but their Dispositions to propagate this or that Motion into the Sensorium, and in the Sensorium they are Sensations of those Motions under the Forms of Colours.
Page xxx - Now Israel loved Joseph more than all his children, because he was the son of his old age : and he made him a coat of many colours.
Page 73 - The yarn thus manufactured, is wove into a coarse kind of white cloth, of a seemingly loose texture, but of incredible durability, the life of one person being seldom sufficient to wear out a garment made of it ; so that the same piece descends from mother to daughter.
Page 2 - Colours may be produced by Composition which shall be like to the Colours of homogeneal Light as to the Appearance of Colours, but not as to the Immutability of Colour and Constitution of Light.
Page xxv - and he received besides a certain share of the profit. Immunities and a share also of the gain were granted to the two brothers, lords of Tolfa, in whose land the aluminous mineral had been found. This accession of wealth to the Church of Rome was made, by the divine blessing, under the Pontificate of Pius II. ; and if it escape, as it ought, the hands of tyrants, and be prudently managed, it may increase and afford no small assistance...
Page 2 - Immutability of Colour and Constitution of Light. And those Colours by how much they are more compounded by so much are they less full and intense, and by too much Composition they may be diluted and weaken'd till they cease, and the mixture becomes white or grey. There may be also Colours produced by Composition, which are not fully like any of the Colours of homogeneal Light.
Page xxv - Pontiff employed skilful people, who proved that they really contained alum ; but lest some deception might have been practised, others were sent to the place where they had been found, who met with abundance of the like kind. Artists who had been employed in the Turkish mines in Asia were brought from Genoa; and these, having closely examined the nature of the place, declared it to be similar to that of the Asiatic mountains which produce alum; and, shedding tears for joy, they kneeled down three...
Page 3 - Whiteness and all grey colours 'between white and black may be compounded of colours, and the whiteness of the sun's light is compounded of all the primary colours mixed in a due proportion.
Page 100 - ... after which, lying an hour or two (supposing the sun still shining), it will be of a very deep purple-red, beyond which the sun can do no more.