Radon (Rn) contents in spring water of Misasa spa, Sekigane spa, Togo spa and Ikeda spa were determined using a liquid scintillation counter. The contents were counted by appling the integral counting method with a liquid scintillation counter 3 hours and 10 minutes after extraction with toluene scintillator solution (PPO 4.0g and POPOP 100mg in 1000ml toluene solution) from spring water.
The results obtained by this method showed a good correlation with that of IM-fontactoscopy (γ=0.995) or of an ionization chamber equipped with vibrating reed electrometry (γ=0.984) on the determination of Rn in spring water.
Rn contents in 60 samples of Misasa spring water were ranged from 1.35 to 686.87×10^-10Ci/l (0.37-188.89 M.E.). Rn contents were shown to be above 20×10^-10Ci/l (above 5.5 M.E., discriminating point of spring water from plain water in Rn contents) in 54 of 60 samples (90%), above 30×10^-10Ci/l (above 8.25 M.E., discriminating point of spring water for medical treatment from plain water in Rn contents) in 46 of 60 samples (77%) and above 181.8×10^-10Ci/l (above 50 M.E., strong radioactive spring water in Rn contents) in 15 of 60 samples (25%), respectively.
Rn contents in spring water of Sekigane spa (15 samples), Togo spa (16 samples) and Ikeda spa (5 samples) were ranged from 22.71 to 157.19×10-¹⁰Ci/l (6.25-43.23 M.E.), 0.43 to 38.68×10-¹⁰Ci/l (0.12-10.64 M.E.) and 407.4 to 7695.1×10-¹⁰Ci/l (112.0-2116.2 M.E.), respectively.
In Misasa spa, the mean value of Rn contents in 8 samples of ground water was 14.65×10-¹⁰Ci/l (4.03 M.E.) with a ranged from 2.64 to 32.13×10-¹⁰Ci/l (0.73-8.84 M.E.).
Rn contents in 10 samples of surface water (Mitoku river) were ranged from 0.39 to 3.18×10-¹⁰Ci/l (0.11-0.87 M.E.). Rn contents in surface water of the Mitoku river was the highest around the center of Misasa spa area.

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Radon (Rn) contents were determined in the air of radioactive spa areas and in human expiratory air after the treatment with spring water using an ionization chamber equipped with vibrating reed electrometer.
The results were as follows.
(1) Rn contents in outdoor air at spa areas of Misasa, Sekigane and Ikeda were significantly higher than those at non-spa area of Kurayoshi city.
(2) At Misasa spa, Rn contents in outdoor air tend to increase from June to September in a year. There was a negative correlation between Rn contents in outdoor air and rainfall a day.
(3) Rn contents in the air of private house and health resort hotel at Misasa spa area were ranged from 0.5 to 1.5pCi/l and 0.6 to 3.5pCi/l, respectively. Rn contents in the air of facilities using springwater at Misasa brabch hospital Okayama University were determined; for exsample, the usual bathroom: 21.8±2.1pCi/l, the Hubbard bathroom: 143.4±69.8pCi/l and the drinking hall: 30-47pCi/l, respectively.
(4) Generally, Rn contents in expiratory air of persons living at Misasa spa area were not different from those at non-spa areas.
(5) Rn contents in the expiratory air reached a maximum about 40 minutes after the treatment in spring water bath, and the ratio of Rn in the expiratory air to that in spring water was about 1.1%.
Rn contents in the expiratory air showed a maximal level 40 to 60 minutes after a person entered into the drinking hall, and the ratio of Rn in the expiratory air to that in the air of drinking hall was about 85%.
(6) As the bathing time was longer, the subjects were younger, Rn contents in the expiratory air became higher during bathing in Misasa spring water.
The biological half-life of Rn contents in expiratory air of subjects after batning, inhalation (hot-air bathroom) and drinking of spring water was ranged from 40 to 43 minutes.
In use of radioactive spring water, utilized efficiency of Rn in the body was in order of inhaltion, bathing and drinking from the view of Rn contents in expiratory air.
(7) The ratio of Rn excretion in urine to total Rn intake was about 0.08% after the drinking of Misasa spring water.

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By using the relation between nasal-obstruction and nasal skin temperature, the subjective change of nasal obstruction and the change of temperature in nasal skin area by thermography, coursed by 10 minutes electric acupuncture (Gohkoku-Naikan), were mutually connected with posture. So, that two changes between sitting posture and supine position was reported here. The subjects were patients with hyperesthetic rhinitis chiefly omplaining nasal obstruction.
The results; The sitting position was effective in subjective change of nasal obstruction and also it kept the nasalskin temperature low. In case of the subjects of an electric acupuncture after stellate ganglion block in sitting posture, no change of nasal obstruction and nasalskin temperature was recorded.

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