Clary sage (Salvia sclarea L.) is chiefly cultivated in Southern France, Italy, Spain, North Africa, and also on the Crimean Peninsula in the U. S. S. R. The green parts of the plant, especially the flowering tops, contain essential oil. The oil can be isolated from the flowering tops and leaves of the plant by steam distillation or by extraction with volatile solvents. The main components of the oil are 1-linalyl acetate and 1-linalool.
This paper reports the variations of the percentage yield and the chemical composition of the oil as well as factors affecting the variations.
The yield of clary sage oil is subjected to wide variations : it depends upon climatic and weather conditions, and also upon flowering period.
The percentage of the oil increases gradually from the beginning of June toward the end of July. The oil content varies during the course of day and night, reaching a maximum about midday.
During the development of the plant, the maximum oil content of racemes is attained by the end of the blossom period (0.15 to 0.18 per cent yield) . At that time the ester content (1-linalyl acetate) of the oil was 42.4 to 44.2 per cent.
In the examination of the daily variations in the cheminal composition of the oil, it was found that the atmospheric temperature and the amount of sunshine had a certain influence on the mutual conversion between 1-linalyl acetate and 1-linalool.
In fractional distillation the variations of the chemical composition of the oil were examined, and it was found that the 1-linalyl acetate and 1-linalool % were high in initial distillation (1-linalyl acetate : 40 to 50%, 1-linalool : 20 to 25%) and low in after distillation (1-linalyl acetate : 25 to 30%, 1-linalool : 10 to 15%) .

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Growth-retardants ; CCC, BCB and B-9 were sprayed on the new shoots after topping in July. CCC at 10, 000 ppm and 5, 000 ppm were effective for the flower-cluster formation and reduction of shoot length, but BCB and B-9 were ineffective. Ringing on spring shoots from July to September was most effective on the induction of flower-bud formation.

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The changes in pectic constituents which were fractionated into water soluble, Calgon soluble, hydrochloric acid soluble at 85°C and hydrochloric acid soluble at 100°C and in holocellulose and cellulose in Alphonso and Paini mangoes during ripening at ambient storage, besides with the changes in physical characters and chemical constituents, were investigated.

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