Volume 1

Experiments and observations relating to various branches of natural philosophy; with a continuation of the Observations on air / By Joseph Priestley.

  • Priestley, Joseph, 1733-1804.
Date:
1779-1786
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations relating to various branches of natural philosophy; with a continuation of the Observations on air / By Joseph Priestley. Source: Wellcome Collection.

    31/538 (page 25)
    f INTRODUCTION. IAVING, in the Introductions to my three volumes on the fubjed of the different kinds of air> noticed the improve¬ ments I had made in my apparatus, with the new proceffes I had made ufe of, and explained the figures proper for that pur- pofe, I fliall do the fiime in this treatife. I have not, indeed, any thing of much importance to defcribe j but to perfons who have many experiments to make, and who have little time to give to them, fmall improvements are often of no fmall value. Fig. i, reprefents the Jhelf on which I place the jars in my trough of water, and which is formed on the plan of that of the Due de Chaulnes, with a fmall addition. It is made to be fixed higher or lower in the