Seventeen rabbits whose age ranged from 10 days to 6 months were used to investigate the evoked pontential to pure tone stimuli.
The test stimuli were a 1000 cps pure tone at the level of 40, 50, 60, 70, 80, and 90 db, and a 4000 cps pure tone at the level of 30, 40, 50, 60, 70 and 80 db. The brain potentials of the young rabbits were recorded by means of the automatic superimposing method. The evoked potential to both 1000 cps and 4000 cps pure tones could be obtained in all the rabbits older than 27 days. The threshold of the evoked potential of rabbits decreased with their age as was the case with that of human being.

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Unilateral perceptive deafness in which one ear is impaired by 60db or more and the other ear essentialy normal is fairly uncommon.
The clinical pictures of seventy cases of such unilateral deafness have been studied.
Etiology : Many cases might have been attributed to menier's syndrome and sudden deafness (20cases), local and general infection (10 cases), brain tumor (7 cases), head injure (4 cases) and streptmycine deafness (1 cases). The largest group (28cases), however, was obscure the etiology and time of onset (Figure 1).
Age at onset or awarness of the impairment:most cases were under twenty years old, and far younger age group was most evident. (Figure 1, 2).
Complication: Tinnitus and vertigo were observed in 29% and 24% respectively, but on the younger cases than twenty (Table 3, B) the complication were very seldom seen.
Through this observation, the group of unilateral impairment was differentiated because of the special picture presented from that of other unilateral deafness, and a term "Juvenile unilateral total deafness of unknown etiology was proposed by the author.
The characteristic of this group are as follows :a. unilateral, total and permanent deafness in one ear, and normal hearing in other ear.
b. onset under twenty years old or in younger age.
c. principally, not complicated with tinnitus and vertigo.
d. no difference between male and female.
According to this study, the probable etiology could be infection, especially virus infection in very early life, but congenital origin should not be ruled out.

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A case of ceruminous gland adenoma of the right external auditory meatus ("Ceruminoma ")was described. The patient was a 44 years old male with chronic otitis media. Diagnosis of ceruminous gland adenoma was made by histological examination. The tumor was extirpated surgically and the postoperative course of the patient was favourable without any signs of recurrence of the tumor. Ceruminous gland adenoma of the external auditory meatus is rarely seen and only 19 reports of such case are found in literatures.

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1) Of the total 161 cases of cancer of the maxilla which were diagnosed in our hospital, 115 cases were treated according to our approach and the remaining 23 cases received conservative treatment alone. All cases was followed up for more than one year.
2) We estimated the size and the direction of extension of the tumor mainly from X-ray findings, and later necessary corrections were added with operative findings.
3) Six types were classified according to the presumptive site of origin. According to the direction of extension, antral type was divided into 5 types in frontal plane (medio-superior, laterosuperior, medio-inferior, latero-inferior and antrum diffuse and into 4 types in sagittal plane (central, anterior, posterior and bipolar). Size of the tumor was expressed in 4 grades (localized, relatively localized, extensive and highly extensive).
Presence or absence of metastasis was also mentioned.
4) 98% of all cases was the type of antral origin, among which relatively localized type was 33%, extensive type 61%, medio superior type 36% and antrum diffuse type 39%.
Metastasis, wich was present in 16% of all cases, was associated in comparatively higher percentage with medio superior, antrum diffuse and posterior types.
5) Routinely employed policy of treatment in our hospital was preoperative irradiation, total resection of maxilla and postoperative intracavitary irradiation, with the exception of radiation therapy alone for inoperable and in cases where the operation was refused.
6) When treated in our routine sandwich method, three year survival rates for relatively localized and extensive types were 40%(4/10) and 33% (3/9), respectively.
The former, when treated with radiation alone, showed three year survival rate of 36% (4/11).Thus, the results fall within the range of 30 to 40%.
When the extensive type was treated with radiation alone, three year survival rate of 12% (3/25) was obtained. Over-all three year and five year survival rates were 24% (14/58) and 36% (5/14), respectively.
7) It is felt that closer cooperation of surgeons and radiologists is essential to attain better therapeutic results.

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The auther made a clinical and hystological observatons on the process of the grafted mucous menbranes making use of akaike's method. The results were as follows.
In the period of 25 to 50 days after the transprantation, these grafted (pathologicl) mucous menbrans of 31 cases showed their clinical recovery in 66.7 per ct. of them; and in the period of 60 to 90 days, they showed their clinical recovery in 89 per ct.
In this pathological and histological process of 23 cases; especially in the period of 300 days after the transplantation, the grafted mucous menbranes, which had ciliar epitheliums as many as columnar epitheliums when they where transplanted, turned on the flat epitheliums gradually and in the period of 30 to 50 days turned on the flat epitheliums perfectly. In 60 to 80 days, ciliar epitheliums and columnar epitheliums increased again. The former were nearly equivalent to the latter. And at last, most of the grafted mucous menbrans were transformed into the ciliar epitheliums. Most of the storomas had showed the serious state of chronic inflamation when they were transplanted. But they gradually grew smaller and smaller, and in the period of 140 to 180 day after the transplantation they shwed the state of repose a little. And then, in the period of 250 to 300 days, almost all showed the state of repose perfectly. Through this process, the fibrosis tendency of these grafted mucous menbranese becom gradully conspicuous. As for the glands, they were observed in many cases on the transplantation. But in the period of 10 to 20 days, most of the glands of them disappeared. And the authar recognized; in the period of 60 to 80 days after the transplation, the glands wher found again in some part of the grafted place, and still more after, they gradually increased.

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A report of a case of Ewing's Sarcoma originating from the left portion of the mandibulla in a 12 years old girl was reported.
The size of the tumor was 7 *6 *3cm, centered around the left Angulus mandibullae, a part of Corpus mandibullae, and almost the whole Ramus mandibullae was completly destroyed.
The case was first diagnosed as Ossifying Fibroma, but histopathologic examination showed it to be Ewing's Sarcoma.
67 cases of Ewing's sarcoma were found in the Japanese reports, but only one case of mandibulla origin was reported.

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This is a case report of a 57 years old male with tumor involving the anterior ethmoid and partially the frontal sinuses, which probably originated from the left anterior ethmoid sinus, showing histological evidence of squamous cell carcinoma.
The patient had complained of swelling at the root of nose and forehead, and was treated by surgical excision and radiotherapy.
Statistical observation and comparison with that of the frontal sinuses were carried out on 26 cases of primary cancer of the ethmoid sinuses fo and by review of the literature for the past 37 years in Japan.

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The deviation of the arm and bodily movement caused of the Vestibulo-spinal Reflex was observed. The arm movements were recorded after the subject was long time in placed for a vertical writing method with eyes covered, with normal upright head position, and the same procedure of writing was repeated with changes in head position and induced by rotatory stimulation. The bodily movements were recorded by tracing the movement of photoelectric bulb. Simultaneously, the relation between bodily movement and rotatory nystagmus was pursued.
The results were as follows:
1) All of normal cases showed " no deviation of the arm" (in writing method).
2) Seventy-five percent of cases with vertigo showed "deviation of the arm" (in writing method).
3) After rotatory stimulation the deviation of the arm in writing method showed one-phasic change in rotation of 20 and 30 degrees per second and two-phasic change in rotation of 60 degrees per second.
4) The rotatory stimulation caused bodily movements, with the degree of bodily movement depending on the intensity of rotatory stimulation.This relationship was more marked than the individual index of stability.
5) In bodily movement and rotatory nystagmus, a quantitative interdepence between stimulation and responses was observed : When the stimulation was greater the latency was shortened. and the duration seemed prolonged and bodily movement curves were generally parallel with nystagmus curves: However the differences between nystagmus and bodily movement seen were that the latency of nystagmus was shorter than that of bodily movement, and the bodily movement disappeared earlier than nystagmus.

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