This is a proportional analysis of the stone garden of Ryoan-ji. In this thesis, I revise my previous dlssertation-'on the composition of the garden of Ryoan-ji by Dynamic Symmetry' published by Zoen-Zasshi (Journal of the Japanese Institute of Landscape Architects, vol.2, No.2, June, 1935).
My revised analysis on the proportional study of Ryoan-ji garden is shown as in Fig. 1. In this analysis, I set my proportional unit upon the stone group C and D. The five stone groups totaling fifteen stones in this garden may be divided by two groups which are very heterogeneous from the viewpoint of stone-form and their treatment, namely between B, C, D groups and A, E groups. The B, C, D stone groups are arranged by the usual technik of Japanese old tradition just like taking root deeply, and all stones of these B, C, D groups are very popular as we can see in many other famous Japanese gardens, while the A, E stone groups, especially their main big two stones are tame mountain stones which have harsh corners and treated just like placing on garden surface. On these points and others, there are on deduction-are these two big stones of A, E groups changed after by some one? This deduction has been tried by the late Sensho Tanaka. On the standpoint of garden morphology, I think that this deduction is very important and requires furthe rexamination, so my proportional analysis evolve basing on the stone groups of C, D and B.
This proportional analysis unfold to all stone arrangements concerning with the garden space by the golden section ratio and totally the rectangle abcd is composed as in Fig. 1. The method of this analysis is based on the Dynamic Symmetry by Jay Hambidge (1920) and this proportional analysis may be arranged by the following proportion series.
0.292 0.472 0.764 1.236 2.000 3.236 5.236 8.472...(2)
...0.146 0.236 0.382 0.618 1.000 1.6182.618 4.236...(1)
1 2 3 4 5 6 7 8
...0.326 0.528 0.854 1.382 2.236 3.618 5.854 9.472...(3)
(1) is primary series which I maintained in 1939 with (2).(2) series is multiplied by 2 of each term of primary series, and (3) series is derived by totaling every each other term of primary series. All these proportional numbers of series are arranged by the ratio of golden section.
It may be said that the stone arrangement of Ryoan-ji garden is very good generally by this proportional dissertation. But there are some problems partially. It is to be desired that main stone of A group in disregard of the above mentioned point, may be moved theoretically, and the curb stones of left hand side may be enlarged to the side ab of the compound rectangle abcd as in Fig. 1, although impossible under the present condition.

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The fall webworm, Hyphantria cunea Drury, is inportant injurious insect. The webworm is native to North America. It has been introduced into some areas of Europe and Asia. Distributions in Japan: Tokyo, Kanagawa, Saitama, Chiba. Ibaraki, Gunma, Yamanashi, Aichi, Osaka, Okayama, Toyama, Niigata, Isikawa, Hyogo, Tochigi, Fukushima, Miyagi, Nagano, Akita, Iwate and Shizuoka.
This insect has been found feeding on more than 60 garden plants in Tokyo. This insect passes the winter in the form of brown pupae, enclosed in lightly woven, silken cocoons. These cocoons will be found under trash on the ground or sometimes under the bark of trees, the moths begin emerging during the spring and continue to come out over a long period. Both sexes are winged, satiny white, sometimes with brown or black spots. They lay their eggs on under side of the leaves, in masses, partly covei ed with white hairs, and the caterpillars hatching from these eggs construct webs over the leaves inside of which they feed. They continue feeding for about 1 month to 6 weeks, and upon becoming full-grown, crawl down the tree and construct the cocoons in which they pupate.
The adults emerge late in the summer and lay eggs for a second generation of the worms in early fall, which, upon becoming full-grown, spin the cocoons in which they pass the winter as pupae.
This paper presents results of a some biological study (head width in larvae, development and growth spead of larvae, food plants and habit, mechanism of population dynamics) made during 1959-65 on the Fall Webworm, Hyphantria cunea Drury in Tokyo.

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We had experimented, in order to get effect of given to a certain lawn grass (one variety of Zoisia matrella), from 26th July to 13th November'65.
The three sections of this experiment case was divided.
(A) Total sum of the regular fertilizer has been manured at the start, and result been expected at the last term.
(B) Total sum has been manured similar as (A) at the start, but the experiment has finished as the midterm.
(C) Total sum was divided in two volumes equally, one half at the start and the another half at the mid-term.
The results were obtained as follows:
1) In the experiment of (A) and (C);, the Urea Z was efficacious three to five times compared at the growth rate of turf more than the contrast of ammonium sulphate.
2) In the (B), comparing the contrast to ammonium, the Urea Z was efficacious forty-five to eighty % on the growth rate of turf.
4) On the substance of the plant, analysis date of the lawn grass of Urea Z sections was generally superior to the case of nitrogen, phosphorus and potassium

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Germination experiments of a few grasses and weeds were carried out to make sure of the toxic effect of root exudate from creeping red fescue (Festuca rubra) upon other plants.
Some of the methods of experiments are (1) germination tests of perennial rye grass (Lolium perenne) and Artemisia vulgaris in Petri dishes with filter paper from which dense seedlings of creeping red fescue had been removed, (2) Artemisia vulgaris tests in Petri deshes with filter paper with alcohol extract of root exudate, and (3) Artemisia vulgaris tests in Petri dishes with soil with alcohol extract of root exudate.
The results were obtained:
(1) Root exudate of creeping red fescue had few effects on germination of perennial rye grass and Artemisia vulgaris.
(2) An obvious effect could be found on the growth of these seedlings, especially on their root growth.
From another experiment, that is, germination tests of Miscanthus sinensis in Petri dishes with soil from creeping red fescue field, it could be found that the germinating rate of this species was lower compared with the check.
From these results, it may be presumed that the root exudate of creeping red fescue has toxic effct on germinut'on of plants, of which germinating energies are smaller.

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