Convention, Volume 1;Volume 31 |
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Halaman 463
... illumination than to the average , and in many cases of low - intensity illumination , such as village and country light- ing , a still considerably lower illumination than assumed in the paper would be satisfactory and sufficient ...
... illumination than to the average , and in many cases of low - intensity illumination , such as village and country light- ing , a still considerably lower illumination than assumed in the paper would be satisfactory and sufficient ...
Halaman 464
... illumination is desired than that assumed in the paper , the incandescent - lamp system increases in cost over the arc - lamp system by the greater number of posts required , if the lamps are spaced so as to get the same minimum ...
... illumination is desired than that assumed in the paper , the incandescent - lamp system increases in cost over the arc - lamp system by the greater number of posts required , if the lamps are spaced so as to get the same minimum ...
Halaman 587
... Illumination Distance Illumination ... 3.0 0.33 34 4/13 3/2 34 4.0 217 4/15 4 44 4/17 4/2 43 % 2/9 5.0 4/19 1/5 66.7 61.5 57.2 53.4 42.2 40.0 200 ft . 0.0036 0.0042 0 0049 83.4 77.0 71.5 250 ft . 0.0023 0.0027 0.0031 92.4 85.8 0.0016 ...
... Illumination Distance Illumination ... 3.0 0.33 34 4/13 3/2 34 4.0 217 4/15 4 44 4/17 4/2 43 % 2/9 5.0 4/19 1/5 66.7 61.5 57.2 53.4 42.2 40.0 200 ft . 0.0036 0.0042 0 0049 83.4 77.0 71.5 250 ft . 0.0023 0.0027 0.0031 92.4 85.8 0.0016 ...
Isi
Conventions of the Association | xxxi |
Members CompaniesClass A | xxxvii |
MembersClass B | lv |
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