The control of upright posture in healthy people is maintained in conformity with integrated visual, depth, and vestibular information. If visual information is suddenly blocked, mode of the information processing system are compelled to change. The present paper examines the effects of this situational impact on body sway.
Two experiments were conducted.
Experiment I: Twenty-one healthy normal subjects aged 19 to 51 were examined by repeating the opening their eyes of for 30 seconds and the closing for 30 seconds during 3 minutes.
Experiment II: Twenty-eight healthy normal subjects aged 21 to 51 were examined under the following condition; the opening for 45 seconds, the closing for 90 seconds and the opening for 45 seconds.
The body sway was measured by using a strain gauge-platform system reported previously (Model 1G02, San-ei Instrument Co., Tokyo).
The results were as follows:
1) Body sway was significant when the subject's eyes were closed as compared to when their eyes were open. The phenomenon was apparent in 78% within 4 seconds after the eyes were closed. Increments in sway were remarkable in the middle frequency-band of wave length of sway, and were observed both in a back-and-forth direction and from side to side.
2) In 88% of the subjects, the increased sway began to return to the levels of opening their eyes within 29 seconds after the eyes were closed as they had become adapted. This was reflected in the lowering of sway in the low and middle frequency-bands of wave length.
3) In low frequency-band of wave length, back-and-forth sway was significantly greater than that from side to side whether the eyes were open or closed.
4) The degree of increment of sway was reproducible in the same individual. However, no significant correlations were observed between two trials using the same subject, in the latent time taken for the increment to appear and in the time taken for the adaptation to establish.

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Daily administrations of 25mg/kg cobalt chloride to rabbits for three days evoked a significant increase of lipid peroxides in erythrocytes and plasma accompanied by an increase in the reticulocyte count.
The proportion of blue cells that is an overall blue coloration after the supravital staining with crystal violet, did not correlate with the increase of lipid peroxides in erythrocytes of cobalt-treated rabbits. Cobalt induced a slight but nevertheless significant increase in the percentage of methemoglobin but caused a decrease in SOD activity in erythrocytes.

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Changes in organic solvents concentrations in blood, bile and liver and in serum GOT and GPT activities of dogs were measured two hours after the administration of six organic solvents.: 1, 1, 1-trichloroethane, 1, 1, 2-trichloroethane, trichloroethylene, tetrachloroethylene, toluene, m-xylene and controls. Five dogs were used as the intravenous administration for each solvent. The results obtained were as follows.
1. Very small amounts of each solvent administrated were excreted into the bile within 2 hours.
2. The unchanged solvent translation rate from the blood to the liver and from the liver to the bile was different for each solvent.
3. Elevated serum GOT and GPT activities were recorded after the intravenous administration of 1, 1, 2-trichloroethane and tetrachloroethylene.

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A new method to determine the levels of chlorhexidine[1, 6-di (4'-chlorophenyldiguanido) hexane-CH]in disinfectants has been developed and is reported here.
Disinfectants, including 50-200μg CH, were diluted with buffer solutions of pH 11.2 or 11.6 to 20ml. The solutions were applied directly to Extrelut columns and eluted with ethyl acetate. During the operation, CH was extracted and purified. The eluate was concentrated to about 0.1ml under reduced pressure, and converted with trifluoroacetic anhydride to a triazine derivative of CH. The solution was evaporated under a dry N₂ gas spray, dissolved in 0.2M trimethylanilinium hydroxide in methanol, and subjected to on-column methylation on a gas chromatographic column. The amounts of CH were determined by gas chromatography. The method was found to be simple, rapid and very accurate.
Recoveries of CH in disinfectants were more than 95% when the amounts ranged from 50μg to 200μg. Using the present method, the CH in raw 4, 5and 20%CH⋅digluconate preparations was determined at concentrations of 2.27, 2.87 and 11.3%, respectively. If CH is converted to CH⋅digluconate, the concentrations should be 4.05, 5.10 and 20.0%, respectively.

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This study examined the age-specific death rates from lung cancer for males grouped by age from 50-54 to 70-74 in the years 1960, 1965, 1970 and 1975 in 46 Japanese prefectures with the exclusion of Okinawa.
A multiplicative model in which the annual expected death rate from lung cancer for each age group is represented by r..α_iβ_j fit the observed data very well for all prefectures. In this model, r..=∑∑d_ik/∑∑n_ik, where d_ik and n_ik denote respectively the number of deaths and population of an age-year call (i, k), α_i is the effect of i th age group on death rate common to all prefectures, and β_j is the effect of j th birth cohort on death rate for each prefecture.
The standardized mortality ratio of lung cancer in 1975 and a measure of the changes of the β_j i.e. estimates of β_j among birth cohorts were calculated for each prefecture, and used to describe the trends over time of age-specific male death rates from lung cancer in each prefecture.

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The percentage point values of the Student's t-distribution were calculated with a Sharp PC-1211 calculator down to the fourth decimal place.
When the data were compared with those in the Fisher and Yates' t-table (1949), five errors were found in the latter: for 31. 598 (D. F.=2, P=0.001) read 31. 599; for 12. 941 (D. F.=3, P=0.001) read 12.924; for 6.859 (D. F.=5, P=0.001) read 6.869; for 5.405 (D. F.=7, P=0.001) read 5.408 and for 3.767 (D. F.=23, P=0.001) read 3.768. Although three of the errors were corrected in the 1963 edition, two erroneous values, 31. 598 and 3.767 remained.
The author found that most textbooks for statistics quoted the original table, except for those written by Yamauti et al. (1972) and Kuebler et al. (1976). Such errors in quotation obviously need to be corrected.

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