We, street lighting committee, required toward Gas or Electric light companies in England and Germany, the following several inquiries relate to the street lighting.
1.Total length and area of the city street.
2.No.of street lighting poles.
3.Installation cost and it's resours.
4.Anual maintenance and it's resours.
5.Total KW and gas capacity.
6.Lighting rate (compare with interior lighting rate)
7.Length of illuminated streets.
8.Owner and supervisor.
9.Regulation of street lighting. (for Act or Law.)

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This article deserihes about the illumination of the stations, Uyeno, Asakusa, etc., and cars of the Tokyo Subway Company.Intensity of stations and platforms are about 25 to 50 metre candles, and cars are 37 metre candles on the horizontal plane 80 c.m.above floor at normal voltage.

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The tensile strength of heating wires, imported and made in our country, is tested at various temperatures.Specim: ns made with B&S#23 wires are heated in an electric furnace kept at a. constant temperature.Each time, after heating for an hour, three hours and five hours, their strength is measured with a spring balance, increasing the yapplied force at nearly constant rate.
The temperature is measured by means of a Pt.Pt.Rod.thermocouple and a millivoltmeter.It. is varied from room temperature up to 1180°C with 100°C step.The strength with 15 minutes intervals fbr 5 hours at the constant temp.1000°C is also measured.
From these tests, it is concluded that;
(1) The tensible strength of the heating wires for high temperature use is greater at a lower temperature than that of the wires for low temperature use, but at a higher temperature they have nearly equal value.
(2) The strength decreases rapidly at about 600°C, and at 700°C, it becomes about one third of the value at the room temperature.From 700°C, it decreases gradually with the temperatu re.
(3) The decrease in the strength of Nickerome No.1 and No.2 is not so large as those in other metals.
(4) The effect of the heating time on the strength can not be found in this experiment.
(5) In some of the ourves, can be found two max.point, one at 300°C and the other at 800°C.

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