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acid gas added alkali alum ammoniac appears astringent atmospheric air azotic gas bar iron bark basaltes boiled calces calx calx of iron carbonic acid carbonic acid gas charcoal chemical chemistry chemists coal contain copper decomposition diluted dissolved Doctor drachm earth evaporation experiments exposed filings finery cinder fixed air formed gallic acid galls genous gas green vitriol hundred grains hydrogen hydrogenous gas inches James Woodhouse laboratory lime water manner measures of hydrogenous measures of inflammable Medical ments metal mixed muriatic acid nitrate nitre nitric acid nitrous air obtained ounce measures oxide oxyd oxygenous gas Persimmon Philadelphia phlogiston portion pot-ash powder Priestley Priestley's procured produced prussiate pure air red heat red hot red precipitate resin revived Rush salt Silliman silver small quantity solution stones substance sulphuric acid tained tion tube turbith mineral unites vessel vitriolic acid wall Woodhouse's Xanthorhiza yellow yield zinc
Page 217 - Besides, a knowledge of the first principles of chemistry will teach him when to use lime hot from the kiln, and when slacked; how to promote the putrefactive process in his composts, and at what period to check it, so as to prevent the fertilizing particles becoming effete, and of little value.
Page 215 - Black, and had attended the lectures of that distinguished philosopher in the university of Glasgow. And he often acknowledged " that his first ideas on this subject were acquired by his attendance on Dr. Black's chymical lectures, and from the consideration of his theory of latent heat, and the expansibility of steam.
Page 227 - ... encouraging this process, and how to retard and check it, when it is likely to be carried too far, so as to be sure of uniformly obtaining satisfactory results. In this and in every other process, it must therefore be of importance to acquire some knowledge of the principles of natural substances, and of the nature of those changes which take place in the materials on which we operate.
Page 200 - An amusing occurrence which happened one day in the laboratory. Hydrogen gas was the subject, and its relation to life. It was stated that an animal confined in it would die; and a living hen was, for the experiment, immersed in the hydrogen gas, with which a bell-glass was filled. The hen gasped, kicked, and lay still. 'There, gentlemen...
Page 74 - Dr. Woodhouse was wanting in personal dignity, and was, out of lecture- hours, sometimes jocose with the students. He appeared, when lecturing, as if not quite at his ease, as if a little fearful that he was not highly appreciated, — as indeed he was not very highly. In his person he was short, with a florid face. He was always dressed with care ; generally he wore a blue broadcloth coat with metal buttons ; his hair was powdered, and his appearance was gentlemanly. His lectures were quite free...
Page 221 - chemical; and not a colour can be imparted but in consequence of the affinity which subsists between the cloth and the dye, or the dye and the mordant which is employed as a bond of union between them.
Page 117 - Sometimes this principle is heavy and sometimes it is not; sometimes it is free fire, and sometimes it is fire combined with the earthy element; sometimes it passes through the pores of vessels, and sometimes they are impenetrable to it: it explains at once causticity and non-causticity, transparency and opacity, colours and the absence of colours. It is a veritable Proteus which changes its form every moment.
Page 75 - ... of the facts revealed by chemistry, to illustrate the character of the Creator as seen in his works. At the commencement of the course he treated with levity and ridicule the idea that the visitations of the yellow fever might be visitations of God for the sins of the people. He imputed them to the material agencies and physical causes — forgetting that physical causes may be the moral agents of the Almighty.