Comprise/1 Rough Note Book July 1876 to April 1877 (includes contents page re experiments with 'viscosity apparatus'); /2 Rough Note Book April 1877 to March 1880 (a few pages at rear contain notes for lectures in Dublin and Sheffield and at Chemical Society); /3 Chemical Note Book Feb. 7, 1881 to July 7, 1883 (detailing experiments 1 - 185; some pages at rear are damaged); /4 Laboratory Note Book July 1875 to Dec. 1877 (detailing experiments 758 to 1334; with Index at front); /5 Laboratory Note Book Jan 1, 1878 to May 4, 1881 (detailing experiments 1335 to 1646).