Intensifying solution, [122]

Isochroniser, [89], [91]

details of, [91], [92], [95]

Isochronism, [64], [69], [70], [71]

Kathode rays, [53]

Knudsen, [2]

apparatus of, [9]

Korn, [30], [33], [45], [65], [72]

apparatus of, [31]

Lamps, coloured, [94]