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The conditions of growth of TiB 2 single crystals from iron, cobalt and nickel solutions and those of ZrB 2 and HfB 2 from iron solution have been investigated and the quality of the crystals grown by this method have been characterized. The diboride crystals were formed only when the mole percent of the metal diboride and solvent metal were higher than a critical value in each case. TiB 2 crystals grown from iron contained less than 0.2 wt% Fe, those from cobalt contained about 1 wt% Co and those from nickel contained more than 1.5 wt% Ni. ZrB 2 and HfB 2 crystals from iron solution included less than 0.5 wt% Fe. Etch-pit densities of the (0001) plane of TiB 2 single crystals grown from iron were lower than those from cobalt or nickel. It was possible to obtain single crystals of low etch-pit density in the case of ZrB 2 and HfB 2 . Lang X-ray topographs of TiB 2 , ZrB 2 and HfB 2 crystals grown from iron showed images representing low internal stresses. In contrast, the topographs of TiB 2 crystals grown from cobalt and nickel showed high internal stress images.

Micrographia has been of interest to many neurologists; the phenomenon, however, remained unexplained. We have defined the incidence and characteristics of severe micrographia in a large population of Parkinsonian patients. It is totally separable from tremor and rigidity in these patients and has only an indefinite relationship to akinesia. In about 5% of all Parkinsonian patients, micrographia is present as a prodromal symptom before any other manifestation of the disease is noted; this is true in 30% of those patients who will later develop severe micrographia during the course of their disease. It remains essentially uninfluenced by various forms of treatment of Parkinsonism including stereotaxic thalamotomy; however, during treatment with levodopa some cases of micrographia improve. We feel that micrographia is of central origin, and evidence is offered in support of this hypothesis. A more complete understanding of the mechanism of micrographia would add much to our understanding of some subtleties of extrapyramidal motor dysfunction.

In our previous paper*1 we reported our fundamental study and, to some extent, application to cables of the semiconductive organic liquid which, when mixed in cross- linked polyethylene insulation for cable, deposits on the surfaces of voids in the insulation or between the insulation and the semiconductive layer with the lapse of time and brings about a remarkable reduction in surface restivity there, thus weakening the electric field within voids and eliminating partial discharges. Furthermore, the voltage- time characteristic curve of the cable with such insulation is more horizontal as compared with that of conventional crosslinked polyethylene insulated cable. We have since continued our study on such semiconductive organic liquid inthe process of its application to cable insulationandfound many phenomena. According to our findings, the breakdown voltage is less affected adversely by defects in the insulation and therefore is stable with very little deviation. The cable insulation containing the semiconductive organic liquid has a higher impules breakdown voltage and is free from breakdown at low voltages.

7月孵化の白色レグホーン種の雄雛を10週令より30週令までケージと平飼いで育成し,ケージ育成が性成長に及ぼす影響を調べた。1)平飼に移した後の数週間の増体はケージに較べ劣ったが,30週令では平飼が優れていた。体長,脛長,鶏冠の大きさも同様な傾向を示した。斃死鶏の発生は平飼が多く特に平飼に移した後数週間に著しかった。2)14週令でもマッサージ刺激に反応するものが多いが27週令頃まで反応状態の変動が大きかった。精液性状,授精能力は30週令に至っても満足すべき状態でなかったがケージ平飼両区間に差は認められなかった。3)睾丸の発達は個体差が著しく両区とも一定の傾向は認められなかった。4) 育成期の日長が減退期に当つたことが体成長,性成長を遅らせた主要な原因と考えられる。

With a view to elucidating some aspects of round-worm infection and mass anthelmintic treatment in rural area, the author conducted an investigation of all the pupils of elementary and lower secondary schools in Shirahama-machi, Chiba Prefecture (5 schools, 2, 180 pupils). Monthly stool examination was carried out from Feb. 1957 to Mar. 1959, together with more than ten times of mass anthelmintic treatment in between. Thus, such facts as transition of positive reaction rates, speed of infection or how soon infection occurred, infection rates by seasons, relationship between consecutive anthelmintic treatment and rate of conversion to negative, and that between the frequency of treatment received and the cumulative rate of conversion to negative were obtained by schools. The results of study are as follows.1. Althouge all the five schools belong to the same local administrative unit, machi, their initial positive rates showed a considerable variance, the highest rate being 58.5% and the lowest 12.5%.2. The infection speed by schools was high for the groups with high initial positive rates, in regard to both new- and re-infection. The cumulative positive rates by schools at the end of the first year ranged between 63% and 26%. The infection speed for the re-infection cases showed a higher value than that for the new infection cases.3. Infection rates by seasons inclined to be lower in June and January, and higher in November and February to May inclusive.4. Both Macnin and Nemacin, when employed repeatedly in consecutive treatment, appeared to cause a gradual decline in the rate of conversion to negative;and the severer the degree of infection, the more difficult it was to attain conversion to negative, it seemed.5. The cumulative rates of conversion to negative obtained were: 78.6-94.3% by two courses of anthelmintic treatment, and 94.7-100% by four courses.6. As for the transition of positive reaction rates, the rates became lower in the second year as compared with the first year of anthelmintic treatment program. However, in spite of the consecutive treatment given almost monthly, it would not fall beyond a certain level but rather showed a kind of side crawls (5-15% on an average).On the basis of the above-mentioned findings it was concluded that, taking into consideration the infection speed, treatment should be give more frequently to the groups with high initial positive rates and to the reinfection groups, although it is generally said that mass treatment should be given 2 or 3 times a year.Furthermore, it was considered that it would be difficult to attain the objective of the extermination of round-worms only by means of mass anthelmintic treatment, and that the treatment should be executed side by side with such measures for preventing reinfection as hygienic education, environmental improvement, and esp. the hygienic disposal of human waste, etc.

Thermography is a diagnostic method used to detect infrared radiation from the body. Increased infrared emission may be due to increased blood flow from infection, trauma, surperficial collateral circulation around a blocked artery or vein, or an underlying thrombophlebitis.Recently we used JTG-MA thermoviewer for 159 cases of orthopedic disorders.In the inflammation, peripheral nerve lesions and vascular disorders, the thermograms showed increased warmth over the lesions well. However, in the autonomic nerve symptoms of the spinal disorders, thermograms at rest condition were positive in 1/3 cases, and at cold and ischemic condition, positive in 2/3 cases.