Online Book Subjects: Air Displaying 1 - 3 of 3 Observations on different kinds of air Priestley, Joseph; Hey, William; Royal Society (Great Britain) The air we breathe Letts, E. A.; Smithsonian Institution. Hodgkins fund. Vegetable staticks, or, An account of some statical experiments on the sap in vegetables Hales, Stephen; Royal Society (Great Britain) Printed for W. and J. Innys ... and T. Woodward ... MDCCXXVII [1727] 26. Plant Nutrition