Experiments in various subjects viz optical, chemical and nonsensical and queer things miscellaneously arranged for the benefit of posterity [4 ms. vols.] / J.F.W. Herschel. [The notebooks record Herschel's optical, chemical and photographic experiments in chronological order from experiment number 17, 1813 Jul, to experiment number 1,820 of 1870 May. With a list of chemical expenses 1814-1816 (7 leaves)]