The paper contains a summary of the results of the height distribution of ozone in the atmosphere obtained at Motmt. Abu with a Dobson Speetrophotometer during the period October 1951 to April 1952, when western disturbances affect North Indian weather. The observations show that there is very little ozone in the atmosphere below 18 km., that the ozone amount above 27 km. show very little systematic change with total amount, and that most of the changes take place in the layer 18 to 27 km. These results are compared with those obtained at Delhi, Kodaikanal, New Mexico (with V2 rockets), Arosa (in Switzerland) and Tromsϕ (Norway). In middle and high latitudes, there are substantial amounts of ozone below 18 km., and the larger the total amount, the larger is the proportion in the lower levels. For high ozone amounts in high latitudes, nearly hall the total amount may be below 20 km.