Philosophical, medical, and experimental essays ... /

Contiene: I. On the state of the population in Manchester, and other adjacent places -- II. On the proportional mortality of the small pox and measles, in the several periods of life, and different seasons of the year; together with its comparative fatality to males and females -- III. On the different quantities of rain which fall, at different heights, over the same spot of ground -- IV. On the solution of stones of the urinary and of the gall bladder, by water impregnated with fixed air -- V. On the nature and composition of urinary calculi -- VI. On the internal regulation of hospitals -- VII. On the influence of fixed air on the colours and vegetation of plants -- VIII. On the action of different manures -- IX. On the properties of different absorbents -- X. Miscellaneous observations, cases, and inquiries.

An experimental inquiry into the cause of the changes of colours in opake and coloured bodies. With an historical preface relative to the parts of philosophy therein examined, and to the several arts and manufactures dependent upon them.

The last section, p. [95]-138, is entitled: "A letter to the right honorable the Earl of Morton, president of the Royal Society, containing experiments and observations on the agreement between the specific gravities of the several metals, and their colours when united to glass, as well as those of their other preparations. With additions. By Edward Delaval, F. R. S. Read at the Royal Society, Jan. 24, 1765."