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1. A series of experiments, involving the use of three hundred and forty Rhode Island Red x Light Sussex day-old cockerels, was carried out to determine (a) the influence of floor type on the incidence of perosis, and (b) a method of lowering the high incidence of perosis which may occur when chicks are fed the experimental diet no. 124 originally described by Damet al.(1951).2. It was found that the incidence of perosis was about 60% higher in groups of chicks raised on wiremesh floors than in groups of chicks similarly raised on wooden floors.3. Neither the area of the floor space nor the level of manganese in the diet influenced the incidence of perosis.4. When the calculated choline content of the diet was 500 mg./kg. the incidence of perosis was 60% but when it was raised to above 800 mg./kg. the incidence fell to about 15%. This could not be reduced further by further increasing the choline content.5. Since the rate of body-weight gain increased as the choline content of the diet was raised to 1400 mg./kg. it is suggested that diet no. 124 may be improved from both the points of view of perosis prevention and of growth rate if the choline content is raised to 1500 mg./kg. of diet.

Room cleaning work by an electric vacuum cleaner was studied. Cleaning performance respiration rate and pulse rate during cleaning work using various types of electric cleaners were compared. A cleaner with its motor part built in the wall showed the least cleaning load. Floor type or shoulder type cleaners were demonstrated to be less fatiguable than stick type or hand type cleaners respectively. One hand control could be done with lower pulse rate level. The angle of the suction nozzle should be variable. A handle with an angle of 22.5 and the height of around 750mm considered to be the best.

In terms of geography, the rural house is an important key to clarify a settlement structure. The plan of a rual house differs from one area to another, as it reflects conditions as well as the specific way of living of the people of an area. (Design) By means of securing a picture of the distrubution of house plans in the western part of Japan, I attempted to clarify the regionality in the house plan. In order to discover the regionality I also paid special attention to the relation to the dairy life, process of circulation and of transition. (Metod) 1) Region—Western part of Japan including Wakasa (Fukui Pref.) and Mie Pref. 2) Object— Rural houses in farming, fishing and mountain village. 3) The most common houses in the areas were chosen rather than the distinguished, old ones. 4) 941 examples were selected, —311 examples from my survey and 630 examples from other surveys by other geographers and architects—trying to get the examples from whole parts of the western part of Japan. 5) Not only house types but the life forms were observed by means of an interview method. As it was very difficult to see the inside of many houses and moreover the house plans will be change according to the change in the way of life, as to the distribution of houses, only a general view was taken. (Result) As far as the arrangement of the rooms in the main house, I divided into three parts, that is 1) the house plans (The arrangement of rooms) in the living part, 2) function of rooms and, 3) the function of the earth floor. 1) In the living part, the four room type is very common in Japan.(9. V. Fig. 1, prefatory 1: Fig. 2) The Hiroma type; a spacious room, a floor furnace (9. V. Fig. 1, pf. 2. Fig. 3-9, photo 2-4).This type of house is, geographically speaking, distributed, in the chilly, snowy district of northern part of Japan (Tohoku and Hokuriku district). Hiroma type is widely spread in the western part of Japan, mountain areas of Kyushu, Kii, Northern part of Lake Biwa, Chugoku, Tajima highland, and Oki and Tsushima Island. The mode of life in those areas makes it necessary to place a hall in the center of the main house. Like la maison-bloc, Hiroma type contains everything in one house, including a workroom and others; and therefore, is a suitable type of house for life in a chilly and isolated region. The tsumairi; a house with the entrance at the gabled side (Fig. 1, pf. 3.). The small earth floor type (Fig. 1, pf. 4. Fig. 10, 11). The Futamunezukuri, (Fig. 1, pf. 5. Fig. 12-14. photo 6, 7.), where main body of the house and the kichen are separated, is found in Kagoshima Pref.down to Nansei Island.This type is originated in theMicronesian and the Melanesian Island. The Transformed type, usually called “Kudozukuri” is centered at the Tsukushi Plain in the Northern Kyushu District. It is called Japanese kana “ko” because it has two projection in the rear (Fig. 1, pf.7.Fig.15, 16.photo 8). The L-type, another variety with one projection in the rear of the house, is found in Kyushu (Kagiya), in the Kochi Plain (Magariya), and on the Tamba Plateau (Tsunoya). Old families often adopt this type (Fig. 1, pf. 6. Fig. 17.). 2) Though the names of the rooms are mainfold, it is possible to know the cultural circle and the course of transition by looking for the distrubution of the room with the same name. I am going to offer the distinguished examples here, and especially in Okinoerabu and Yoron island we find some connection with Ryukyu Islands. Though the change of the name (Example of Nikaido village in Nara Pref: Stable←spinning-wheel room←stareroom), it is possible to get dynamic change of life in a rural area. 3) The earth froor is very important elements in the function of farming house.

THIS paper will call attention to a vehicle for childhood trauma that has taken a high toll of minor and major injuries but has as yet eluded notoriety. During a one-year period from 1958 to 1959, I conducted a child-health conference with a case load of about 50 children under two years of age for the Contra Costa County Health Department in California. Within this period 9 children suffered burns on 13 separate occasions from falls onto the grating of room heaters set just below floor level. A summary of these injuries is presented in Table 1. The danger of these . . .