This blue-colored notebook is perfect for chemistry class, the science lab, your thesis or just your general thoughts, notes or journaling. The cover was designed using a vintage illustration of a hydrogen balloon experiment from a chemistry textbook published in 1888 (and the original text which accompanied this illustration). The text states: "The readiness with which hydrogen gas will raise a small balloon may be observed by arranging that the hydrogen gas bottle be passed through a tube containing fragments of chloride of calcium". This notebook is from our "Vintage Science Experiments" art series. Contains 100 lined pages inside.