Spectacularly undervalued during her life-time and only now gaining a modicum of recognition, the late Channa Horwitz was one of the first female artists to attempt a visual language to create rhythm in time. Some works of the artist’s famous Sonakinatography series are currently on view at Lisson Gallery. Horwitz started the series, which is a made-up word amalgamating sound, motion, and notation, in 1968. In it, she assigned eight colors to eight numbers or “beats” in vertical grids where each color moved according to its pre-assigned rhythm. Later, the artist introduced lines and patterns complicating the compositions into infinite visual possibilities. Horwitz’s dogged preoccupation with sequencing the number eight derived from the standard American graph paper, eight squares to the inch, that she laid most of her drawings on. The drawings are exquisite mathematical poetry that transcends the visual and have been adopted for music, dance, poetry, and light-based work. They are unparalleled excursions into logic, symmetry, time and beauty. At Lisson Gallery through February 24.